Technical Manual of Oceanair Refrigeration and Air-Conditioning Series Products. Product overview

Transcription

1 Product overview 1

2 Company Profile Yantai Oceanair Refrigeration & Air-Conditioning Co.,Ltd. was established in 2004 and has been listed on the New OTCBB (Stock Code: ). We are mainly specialized in the development, design, manufacturing, sales and after-sales service of air-conditioning equipments, the installation and commissioning of refrigeration and airconditioning equipments, engineering design and technical consultation services. Our leading products include underground water source heat pumps, sewage source heat pumps, seawater source heat pumps, ground source heat pumps, low and medium temperature water chillers etc. They are widely used in comfort air-conditioning systems in residential and industrial buildings, and are also applied for water temperature control in marine aquaculture, aquatic products processing, as well as process cooling, waste heat recovery and utilization in pharmaceutical, chemical, food, or thermal power industry etc. Our products are sold to more than 20 provinces, cities and autonomous regions domestically and are exported to over 20 countries and regions in Asia, Africa, Europe and South America. Backed up by a team of qualified personnel and strong scientific research capabilities, the company is continuously committed to the research, application and promotion of integrated cross-disciplinary and interdisciplinary projects in HVAC and refrigeration areas. We have been firmly keeping up with innovative technologies, processes, materials and methods in global refrigeration, heating, ventilation, heat pump and relevant industries and have been granted more than 30 national invention patents and utility model patents successively. The company is a pioneer in evaporative water chillers in China and is the only manufacturer specializing in the manufacturing of both special section steel tube-type evaporative condensers and water chillers in China, which currently represents the highest standards of domestic evaporative water chillers. Our products have obtained ISO Quality Management System Certification, ISO Environmental Management System Certification, OSHA18001 Occupational Health and Safety Management System Certification, National Industrial Products Production License, National Energy Conservation Products Certification and Energy Conservation Certification for Innovative Construction Equipments in Shandong Province successively. The company has totally invested RMB 3 million in establishing a product performance testing center with the domestic advanced level to perform performance testing for various products, such as low temperature water chillers, other water chillers and water source heat pump units etc. in -35 cold water to 120 hot water, and the center has been granted the certification by the National Quality Supervision and Inspection Center for Compressor and Refrigeration Equipment. The company covers an area of 45,000 square meters including the floor area of 22,000 square meters, with a registered capital of RMB million and a total asset of over RMB 90 million. Currently, we have more than 180 staff members, among whom there are 3 members with a doctoral degree, 5 members with a master s degree, and over 50 professional technicians with intermediate and senior titles. Moreover, we have been rated as an AA grade credit enterprise by banks, and now is the member of China Refrigeration and Air-Conditioning Industry Association and Shandong Association of Refrigeration. 2

3 Technical Manual of Oceanair Refrigeration and Air-Conditioning Series Products Enterprise Honors 1

4 Product Introduction The System Diagram of Low Temperature Water Chillers Evaporative condenser Terminal Cooling tower Water cooled chiller Evaporative cooling chiller Cooling water circulating pump Chilled water circulating pump Model Code Explanation of the Low Temperature Chiller Dry type, or flooded type if not represented Leaving water Evaporative cooling type Cooling capacity of the chiller KW Low temperature chiller 2

5 OWCCL-G Series Economical and Practical Low Temperature Chillers Product overview Main Features of the Chiller Flooded specialized semi-hermitic double screw compressor of famous international brand is adopted, with no leaking, low noisy, slight vibration and stable performance, which can guarantee a long term safety stable operation High Efficiency and Energy Saving The unit can automatically adjust the energy output of each refrigerating compressor and turn on or turn off each compressor according to the actual requirement and change of the site to ensure a high efficiency operation under low load, avoiding energy (electricity) waste and reducing the energy consumption cost. Dry-type evaporator is adopted which was equipped with the newest type of internal thread high efficiency heat exchange tube, combining the optimized design of the baffle plate inside the shell, which can improve the heat exchange efficiency greatly. Furthermore, the dry-type evaporator is characterized by safety oil return, which can ensure the compressors operating with safety oil return without any external oil return devices. Horizontal water cooled hell and tube heat exchanger and high efficiency screw thread heat exchange tube are adopted with high heat exchange efficiency and convenient water side cleaning. Reliable Refrigerating Circuit The unit is designed with single compressor independent refrigerating system, and the two system of the double compressor unit are independent, possessing flexibility in application and good backup characteristics. Famous international brand refrigerating accessories are adopted in refrigerating system, such as expansion valve, magnetic valve. Famous international brand electrical components are adopted, such as AC contactor, air switch. Advanced Computer Control System Advanced micro computer control technology from HongKong Oceanair Industrial Company is adopted, which can provide complete control and protective functions. The LCD controller is in Chinese and easy to handle, and with friendly human and machine interface. The unit can be operated through the touch screen. One-key startup & shutdown shortcut function Displaying the overall operation condition, parameter settings, alarms and records through the screen figures Auto-timing operation as per the set program, such can be set by day (three phrases) or by weeks, then the computer will control the units to operate automatically, realizing the unattended operation. It can automatically diagnose and display the faults and has the faults statistic function. The faults can be inquired in three ways: fault code, fault times, fault occurring time. The computer controller of the unit has the coordinated control function with the chilled water pump and cooling water pump, which can make the system operate more safely, reliably, and energy-saving, furthermore, the controller can manage the whole water system of the machine room so as to reduce the investment in hardware of the control system of the machine room. 3

6 Product overview Remote monitoring can be realized through the installation of RS485 communication interface. Perfect and Reliable Protective Function The unit is equipped with perfect safety protective devices which can provide all-around safety protection. Default phase protection, anti-phase protection and overvoltage (under-voltage) protection to the power supply. Overheat protection, overload protection, anti-reverse protection, anti-frequent-start protection, exhaust gas temperature overheat protection to the motor of the compressor. Protection for too low high-low voltage difference, too high high-voltage, too low low-voltage, startup delay, too low water flow, too high (low) circulating water temperature, sensor faults and startup & shutdown code. Multiple Choices of Refrigerant R22 refrigerant is applied in standard unit, but other refrigerants such as R134a can also be applied according to customers requirements. Easy to Install on Site The evaporator and condenser are equipped with connecting pipe and flange, which make it easy to install on site. Compact structure of the unit covers small areas. The direction of the pipe connector of the condenser can be changed from right to left and vice versa according to the on-site requirements. The slight vibration makes the unit need no special vibration isolation measurements to be taken. The unit has pass strict test before leaving the factory, so you only need to connect the pipe, power, and fill appropriate amount of refrigerant and conduct simple commissioning before it can be put to use. Note:1. Nominal work condition stipulation: the leaving water temperature of the 43% ethylene glycol water solution is -10, and the water flow of the evaporator and condenser is calculated by 5 temperature difference. 2. The calcium chloride water solution can also be adopted as secondary refrigerant. If the customer wants to apply calcium chloride water solution, please notice in the order. 3. The ethylene glycol water solution can only be used in intermediate temperature brine unit as secondary refrigerant, while the calcium chloride water solution can be used both in intermediate and low temperature brine unit. 4. Besides the above specified product, our company can provide non-standard product according to customers requirement. 5. The dimension may change due to the technology improvement, so please ask for installation drawing. 4

7 Technical parameter Technical Parameters of the OWCCL-G Series Low Temperature Chillers Compressor Evaporator Condenser Model OWCCL-G Nominal refrigerating capacity Working medium KW Kcal/h R22 Semi-hermetic screw compressor Single set input power KW Number Set 1 Power supply system Starting mode 380V/3P/50Hz Y Oil tank heater W 300 Secondary refrigerant Shell and tube dry type Ethylene glycol water solution Leaving water temperature -10 Chilled water flow m 3 /h Resistance KPa 50 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Efficient shell and tube type Entering water temperature 30 Cooling water flow m 3 /h Resistance KPa 75 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Oil separator Packing type Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 33 startup 66,00 25startup 50,75,100 Weight of the unit Net weight Kg Operating weight Kg Outline Dimensions Length mm Width mm Height mm

8 Technical parameter Technical Parameters of the OWCCL-G Series Low Temperature Chillers Model OWCCL-G Nominal refrigerating capacity Compressor Evaporator Condenser Working medium KW Kcal/h R22 Semi-hermetic screw compressor Single set input power KW Number Set 1 2 Power supply system Starting mode Oil tank heater Secondary refrigerant 380V/3P/50Hz Y W Shell and tube dry type Ethylene glycol water solution Leaving water temperature -10 Chilled water flow m 3 /h Resistance KPa 60 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Efficient shell and tube type Entering water temperature 30 Cooling water flow m 3 /h Resistance KPa 80 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Oil separator Packing type Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 25 startup,50,75, startup, progressive increased to100 by 12.5 Weight of the unit Net weight Kg Operating weight Kg Outline Demisions Length mm Width mm Height mm

9 OWCCL Series Energy-Saving Low Temperature Chillers Product overview Main Features of the Chiller Flooded specialized semi-hermitic double screw compressor of famous international brand is adopted, the inserted oil separator of which is modified to obtain a better oil separation effect with no leaking, low noisy, slight vibration, stable performance, which can guarantee a long term safety stable operation. High Efficiency and Energy Saving The unit can automatically adjust the energy output of each refrigerating compressor and turn on or turn off each compressor according to the actual requirement and change of the site to ensure the high efficiency operation under low load, avoiding energy (electricity) waste and reducing the energy consumption cost. Flooded evaporator is adopted which is equipped with the latest flooded specialized external thread high efficiency heat exchange tube, improving the heat exchange efficiency greatly by about 15% comparing with dry type evaporator; and special oil-trap devices is installed in the evaporator to enable the oil in the evaporator to return to the compressor intensively. Horizontal water cooled shell and tube heat exchanger and high efficiency screw thread heat exchange tube are adopted with high heat exchange efficiency and convenient water side cleaning. A secondary oil separator is installed inside the units, which makes the unit obtain strong adaptability and high efficiency. Reliable Refrigerating Circuit The unit is designed with single compressor independent refrigerating system, and the two system of the double compressor unit are independent, possessing flexibility in application and good backup characteristics. Famous international brand refrigerating accessories are adopted in refrigerating system, such as electronic expansion valve, magnetic valve. Reliable oil-return device is adopted. The unit is designed with two-stage oil separator to minimize the oil entering into the system, and efficient and accurate oil return jetting technology is applied to enable the oil entering into the evaporator to return to the compressor intensively, guaranteeing a reliable and efficient operation. Famous international brand electrical components are adopted, such as AC contactor, air switch. Advanced Computer Control System Advanced micro computer control technology from HongKong Oceanair Industrial Company is adopted, which can provide complete control and protective functions. The LCD controller is in Chinese and easy to handle, and with friendly human and machine interface. The unit can be operated through the touch screen. One-key startup & shutdown shortcut function Displaying the overall operation condition, parameter settings, alarms and records through the screen figures Auto-timing operation as per the set program, such can be set by day (three phrases) or by weeks, then the computer will control the units to operate automatically, realizing the unattended operation. It can automatically diagnose and display the faults and has the faults statistic function. The faults can be inquired in three ways: fault code, fault times, fault occurring time. 7

10 Product overview The computer controller of the unit has the coordinated control function with the chilled water pump and cooling water pump, which can make the system operate more safely, reliably, and energy-saving, furthermore, the controller can manage the whole water system of the machine room so as to reduce the investment in hardware of the control system of the machine room. Remote monitoring can be realized through the installation of RS485 communication interface. Perfect and Reliable Protective Function The unit is equipped with perfect safety protective devices which can provide all-around safety protection. Default phase protection, anti-phase protection and overvoltage (under-voltage) protection to the power supply. Overheat protection, overload protection, anti-reverse protection, anti-frequent-start protection, exhaust gas temperature overheat protection to the motor of the compressor. Protection for too low high-low voltage difference, too high high-voltage, too low low-voltage, startup delay, too low water flow, too high (low) circulating water temperature, sensor faults and startup & shutdown code Multiple Choices of Refrigerant R22 refrigerant is applied in standard unit, but other environmental friendly refrigerants such as R134a can also be applied according to customers requirements. Easy to Install on Site The evaporator and condenser are equipped with connecting pipe and flange, which make it easy to install on site. Compact structure of the unit covers small areas. The direction of the pipe connector of the condenser can be changed from right to left and vice versa according to the on-site requirements. The slight vibration makes the unit need no special vibration isolation measurements to be taken. The unit has pass strict test before leaving the factory, so you only need to connect the pipe, power, and fill appropriate amount of refrigerant and conduct simple commissioning before it can be put to use. Note:1.Nominal work condition stipulation: the leaving water temperature of the 41% ethylene glycol water solution is -10, and the water flow of the evaporator and condenser is calculated by 5 temperature difference. 2. The calcium chloride water solution can also be adopted as secondary refrigerant. If the customer wants to apply calcium chloride water solution, please notice in the order. 3. The ethylene glycol water solution can only be used in intermediate temperature brine unit as secondary refrigerant, while the calcium chloride water solution can be used both in intermediate and low temperature brine unit. 4. Besides the above specified product, our company can provide non-standard product according to customers requirement. 5. The dimension may change due to the technology improvement, so please ask for installation drawing. 8

11 Technical parameter Technical Parameters of the OWCCL Series Low Temperature Chillers Model OWCCL Nominal refrigerating capacity Working medium KW Kcal/h R22 Semi-hermetic screw compressor Single set input power KW Compressor Number set 1 Power supply system 380V/3P/50Hz starting mode Y Oil tank heater W 300 type Secondary refrigerant Shell and tube flooded type Ethylene glycol water solution Leaving water temperature -10 Evaporator Chilled water flow m 3 /h Resistance KPa 75 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Efficient shell and tube type Entering water temperature 30 Cooling water flow m 3 /h Condenser Resistance KPa 75 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 25 startup,50,75,100 Weight of the unit Net weight Kg Operating weight Kg Length mm Outline Dimensions Width mm Height mm

12 Technical parameter Technical Parameters of the OWCCL Series Low Temperature Chillers Model OWCCL Nominal refrigerating capacity Working medium KW Kcal/h R22 Compressor Semi-hermetic screw compressor Single set KW input power Number set 2 Power supply system 380V/3P/50Hz Starting mode Y Oil tank heater W Secondary refrigerant Shell and tube flooded type Ethylene glycol water solution Leaving water temperature -10 Evaporator Chilled water flow m 3 /h Resistance KPa 80 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Efficient shell and tube type Entering water temperature 30 Cooling water flow m 3 /h Condenser Resistance KPa 80 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 12.5 startup, progressive increased to100 by 12.5 Weight of the unit Net weight Kg Operating weight Kg Length mm Outline Dimensions Width mm Height mm

13 Technical parameter Technical Parameters of the OWCCL Series Low Temperature Chillers Model OWCCL Nominal refrigerating capacity KW Kcal/h Working medium R22 Semi-hermetic screw compressor Single set input power KW Compressor Evaporator Condenser Number set 2 Power supply system 380V(10KV)/3P/50Hz Starting mode Y Oil tank heater W Shell and tube flooded type Secondary refrigerant Ethylene glycol water solution Leaving water temperature -10 Chilled water flow m 3 /h Resistance KPa 80 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Efficient shell and tube type Entering water temperature 30 Cooling water flow m 3 /h Resistance KPa 80 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 12.5 startup, progressive increased to100 by 12.5 Weight of the unit Outline Dimensions Net weight Kg Operating weight Kg Length mm Width mm Height mm

14 Product overview OWCCL Z Series High Efficiency and Energy-Saving Low Temperature Chillers Main Features of the Chiller Flooded specialized semi-hermitic double screw compressor of famous international brand is adopted, the inserted oil separator of which is modified to obtain a better oil separation effect with no leaking, low noisy, slight vibration, stable performance, which can guarantee a long term safety stable operation. High Efficiency and Energy Saving The unit can automatically adjust the energy output of each refrigerating compressor and turn on or turn off each compressor according to the actual requirement and change of the site to ensure the high efficiency operation under low load, avoiding energy (electricity) waste and reducing the energy consumption cost. Flooded evaporator is adopted which is equipped with the latest flooded specialized external thread high efficiency heat exchange tube, improving the heat exchange efficiency greatly by about 15% comparing with dry type evaporator; and special oil-trap devices is installed in the evaporator to enable the oil in the evaporator to return to the compressor intensively. A high efficiency external oil separator is adopted to carry out secondary oil separation, which makes the unit obtain strong adaptability and high efficiency. Evaporate condenser and high efficient ellipse section tube are adopted. The proper designed sprinkling system enable the forming of uniform water films around the surface of the condenser tubes, achieving a high heat exchange efficiency. The complex cooling water system can be avoided from the water cooled condenser. Reliable Refrigerating Circuit The unit is designed with single compressor independent refrigerating system, and the two system of the double compressor unit share the high pressure, which can save the initial investment and can improve the energy efficiency under partial load condition. Famous international brand refrigerating accessories are adopted in refrigerating system, such as expansion valve, magnetic valve. Reliable oil-return device is adopted. The unit is designed with two-stage oil separator to minimize the oil entering into the system, and efficient and accurate oil return jetting technology is applied to enable the oil entering into the evaporator to return to the compressor intensively, guaranteeing a reliable and efficient operation. Famous international brand electrical components are adopted, such as AC contactor, air switch. Advanced Computer Control System Advanced micro computer control technology from HongKong Oceanair Industrial Company is adopted, which can provide complete control and protective functions. The LCD controller is in Chinese and easy to handle, and with friendly human and machine interface. The unit can be operated through the touch screen. One-key startup & shutdown shortcut function Displaying the overall operation condition, parameter settings, alarms and records through the screen figures Auto-timing operation as per the set program, such can be set by day (three phrases) or by weeks, then the computer will control the units to operate automatically, realizing the unattended operation. It can automatically diagnose and display the faults and has the faults statistic function. The faults can be inquired in three ways: fault code, fault times, fault occurring time. The computer controller of the unit has the coordinated control function with the chilled water pump and 12

15 Product overview cooling water pump, which can make the system operate more safely, reliably, and energy-saving, furthermore, the controller can manage the whole water system of the machine room so as to reduce the investment in hardware of the control system of the machine room. Remote monitoring can be realized through the installation of RS485 communication interface. Perfect and Reliable Protective Function The unit is equipped with perfect safety protective devices which can provide all-around safety protection. Default phase protection, anti-phase protection and overvoltage (under-voltage) protection to the power supply. Overheat protection, overload protection, anti-reverse protection, anti-frequent-start protection, exhaust gas temperature overheat protection to the motor of the compressor. Protection for too low high-low voltage difference, too high high-voltage, too low low-voltage, start-up delay, too low water flow, too high (low) circulating water temperature, sensor faults and startup & shutdown code Multiple Choices of Refrigerant R22 refrigerant is applied in standard unit, but other environmental friendly refrigerants such as R134a can also be applied according to customers requirements. Easy to Install on Site The evaporator and condenser are equipped with connecting pipe and flange, which make it easy to install on site. Compact structure of the unit covers small areas. The direction of the pipe connector of the condenser can be changed from right to left and vice versa according to the on-site requirements. The slight vibration makes the unit need no special vibration isolation measurements to be taken. The unit has pass strict test before leaving the factory, so you only need to connect the pipe, power, and fill appropriate amount of refrigerant and conduct simple commissioning before it can be put to use. Note:1.Nominal work condition stipulation: the leaving water temperature of the 41% ethylene glycol water solution is -10, and the water flow of the evaporator and condenser is calculated by 5 temperature difference. The dry bulb temperature of design condition of the evaporative condenser is 35 and the wet bulb temperature is 24, for the details please ask for the sample of the evaporative condenser. The weight of the unit does not include the weight of the evaporative condenser. 2. The calcium chloride water solution can also be adopted as secondary refrigerant. If the customer wants to apply calcium chloride water solution, please notice in the order. 3. The ethylene glycol water solution can only be used in intermediate temperature brine unit as secondary refrigerant, while the calcium chloride water solution can be used both in intermediate and low temperature brine unit. 4. Besides the above specified product, our company can provide non-standard product according to customers requirement. 5. The dimension may change due to the technology improvement, so please ask for installation drawing. 13

16 Technical parameter Technical Parameters of the OWCCL-Z Series Low Temperature Chillers Model OWCCL-Z Nominal refrigerating capacity working medium KW Kcal/h R22 Semi-hermetic screw compressor Single set input power KW Compressor Number set 1 Power supply system 380V/3P/50Hz Starting mode Y Oil tank heater W 300 Secondary refrigerant Shell and tube flooded type Ethylene glycol water solution Leaving water temperature -10 Evaporator Chilled water flow m 3 /h Resistance KPa 75 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Evaporative Condenser Fan Pump Model OZNX- F Number Set 1 Power KW Number Set Power KW Number Set Make-up water volume m 3 /h Oil Separator Packing type Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 25 startup, 50,75,100 Weight of the unit Net weight Kg Operating weight Kg Length mm Outline Dimensions Width mm Height mm

17 Technical parameter Technical Parameters of the OWCCL-Z Series Low Temperature Chillers Model OWCCL-Z Nominal refrigerating capacity Working medium KW Kcal/h R22 Semi-hermetic screw compressor Single set input power KW Compressor Number Set 2 Power supply system 380V/3P/50Hz Starting mode Y Oil tank heater W Secondary refrigerant Shell and tube flooded type Ethylene glycol water solution Leaving water temperature -10 Evaporator Chilled water flow m 3 /h Resistance KPa 80 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Evaporative condenser Condenser Fan Pump Model OZNX- F Number Set 1 Power KW Number Set Power KW Number Set Make-up water volume m 3 /h Oil Separator Packing type Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 12.5 startup, progressive increased to100 by 12.5 Weight of the unit Dimension Net weight Kg Operating weight Kg Length mm Width mm Height mm

18 Technical parameter Technical Parameters of the OWCCL-Z Series Low Temperature Chillers Model OWCCL-Z Nominal refrigerating capacity Working medium KW Kcal/h R22 Semi-hermetic screw compressor Single set input power KW Compressor Number Set 2 Power supply system 380V(10KV)/3P/50Hz Starting mode Y Oil tank heater W 300 Secondary refrigerant Shell and tube flooded type Ethylene glycol water solution Leaving water temperature -10 Evaporator Chilled water flow m 3 /h Resistance KPa 75 Standard pressure-bearing MPa 1.0 Scaling factor m 2 / KW Connecting pipe size(dn) mm Evaporative type Condenser Fan Pump Model OZNX- F Number Set 1 2 Power KW Number Set Power KW Number Set Make-up water volume m 3 /h Oil Separator Packing type Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 12.5 startup, progressive increased to100 by 12.5 Weight of the unit Net weight Kg Operating weight Kg Length mm Dimension Width mm Height mm

19 Product overview OWCCL-D Series Low Temperature Chillers Main Features of the Chiller Low temperature type semi-hermitic double screw compressor of famous international brand is adopted, with no leaking, low noisy, slight vibration, stable performance, which can guarantee a long term safety stable operation. High Efficiency and Energy Saving The unit can automatically adjust the energy output of each refrigerating compressor and turn on or turn off each compressor according to the actual requirement and change of the site to ensure the high efficiency operation under low load, avoiding energy (electricity) waste and reducing the energy consumption cost. Dry-type evaporator is adopted which was equipped with the newest type of internal thread high efficiency heat exchange tube, combining the optimized design of the baffle plate inside the shell, which can improve the heat exchange efficiency greatly. Furthermore, the dry-type evaporator is characterized by safety oil return, which can ensure the compressors operating with safety oil return without any external oil return devices. Horizontal water cooled hell and tube heat exchanger and high efficiency screw thread heat exchange tube are adopted with high heat exchange efficiency and convenient water side cleaning. Reliable Refrigerating Circuit The unit is designed with single compressor independent refrigerating system, and the two system of the double compressor unit are independent, possessing flexibility in application and good backup characteristics. Famous international brand refrigerating accessories are adopted in refrigerating system, such as expansion valve, magnetic valve. Famous international brand electrical components are adopted, such as AC contactor, air switch. Advanced Computer Control System Advanced micro computer control technology from HongKong Oceanair Industrial Company is adopted, which can provide complete control and protective functions. The LCD controller is in Chinese and easy to handle, and with friendly human and machine interface. The unit can be operated through the touch screen. One-key startup & shutdown shortcut function Displaying the overall operation condition, parameter settings, alarms and records through the screen figures Auto-timing operation as per the set program, such can be set by day (three phrases) or by weeks, then the computer will control the units to operate automatically, realizing the unattended operation. It can automatically diagnose and display the faults and has the faults statistic function. The faults can be inquired in three ways: fault code, fault times, fault occurring time. The computer controller of the unit has the coordinated control function with the chilled water pump and cooling water pump, which can make the system operate more safely, reliably, and energy-saving, furthermore, the controller can manage the whole water system of the machine room so as to reduce the investment in hardware of the control system of the machine room. Remote monitoring can be realized through the installation of RS485 communication interface. Perfect and Reliable Protective Function The unit is equipped with perfect safety protective devices which can provide all-around safety protection. 17

20 Product overview Default phase protection, anti-phase protection and overvoltage (under-voltage) protection to the power supply. Overheat protection, overload protection, anti-reverse protection, anti-frequent-start protection, exhaust gas temperature overheat protection to the motor of the compressor. Protection for too low high-low voltage difference, too high high-voltage, too low low-voltage, start-up delay, too low water flow, too high (low) circulating water temperature, sensor faults and startup & shutdown code. Multiple Choices of Refrigerant R22 refrigerant is applied in standard unit, but other refrigerants can also be applied according to customers requirements. Easy to Install on Site The evaporator and condenser are equipped with connecting pipe and flange, which make it easy to install on site. Compact structure of the unit covers small areas. The direction of the pipe connector of the condenser can be changed from right to left and vice versa according to the on-site requirements. The slight vibration makes the unit need no special vibration isolation measurements to be taken. The unit has pass strict test before leaving the factory, so you only need to connect the pipe, power, and fill appropriate amount of refrigerant and conduct simple commissioning before it can be put to use. Note: 1. In accordance with nominal working conditions: water flow in evaporator and condenser is calculated by 5 temperature difference 2. Expect for the said specifications, our company also provides non-standard products in accordance with customers requirements. 3. Because of technological improvement, exterior dimensions may change, please ask for installation drawing. 18

21 Technical parameter Technical Parameters of the OWCCL-D Series Low Temperature Chillers Model OWCCL- D Nominal refrigerating capacity KW Compressor Evaporator Condenser Oil cooler Single set input power KW Working medium R22 Semi-hermetic screw compressor Single set installed power KW Number Set 1 2 Starting mode Y Starting current A Maximum operating current A Power supply system 380V/3P/50Hz Shell and tube dry type Leaving water temperature -35 Refrigerant Calcium chloride water solution 29.4% (mass fraction) Chilled water flow m 3 /h Resistance KPa 60 Scaling factor of water m 2 K/KW Standard pressure-bearing MPa 1.0 Connecting pipe size(dn) mm DN65 DN 100 DN125 DN150 Efficient shell and tube type Entering water temperature 30 Cooling water flow m 3 /h Resistance KPa 80 Scaling factor of water m 2 K/KW Standard pressure-bearing MPa 1.0 Connecting pipe size(dn) mm DN65 DN100 DN125 DN150 Stainless steel brazed plate heat exchange Entering water temperature 30 Cooling water flow m 3 /h Connecting pipe size(dn) mm DN40 DN 50 DN 65 DN 80 Water side resistance KPa 50 Scaling factor m 2 K/KW Economizer Stainless steel brazed plate heat exchange Safeguard High voltage, low voltage, oil pressure difference, low oil level, ultralow temperature, default phrase, anti-phrase and overload Adjustable range of capacity % 25 startup, 50, 75, startup, progressively increase to 100 by 12.5 Weight of the Net weight Kg unit Operating weight Kg Dimension L W H mm

22 Correction Factor Variable Working Condition Correction Factor of Low Temperature Chiller with Dry Evaporator Leaving water temperature of evaporator Leaving water temperature of condenser Refrigerating capacity power Refrigerating capacity power Refrigerating capacity power Refrigerating capacity power Variable Working Condition Correction Factor of Low Temperature Chiller with Flooded Evaporator Leaving water temperature of evaporator Leaving water temperature of condenser Refrigerating capacity power Refrigerating capacity power Refrigerating capacity power Refrigerating capacity power Variable Working Condition Correction Factor of Low Temperature Chiller with Evaporative Condenser and Flooded Evaporator Leaving water temperature of evaporator Environment temperature Refrigerating capacity power Refrigerating capacity power Refrigerating capacity power Refrigerating capacity power

23 Outline dimensions Outside Drawing of Dry Single Head Unit Ground Reserved centre hole Depth Unit foundation Outside Drawing of Dry Double Head Unit Ground Reserved centre hole Depth Unit foundation Specification and Dimension of OWCC-G Series Water Chiller OWCCL 50G 70G 90G 120G 150G 190G 250G 290G 320G 370G 410G 490G 520G 610G 740G 870G A E G F D M N

24 Outline dimensions Outside Drawing of Flooded Single Head Unit Ground Reserved centre hole Depth Unit foundation Outside Drawing of the Flooded Double Head Unit Ground Reserved centre hole Depth Unit foundation OWCCL A E G F D M N B C

25 Outline dimensions Outside Drawing of Evaporative Single Head Unit Ground Reserved centre hole Depth Unit foundation Outside Drawing of Evaporative Double Head Unit Ground Reserved centre hole H G F Depth D Unit foundation A E L M W N OWCCL- 150Z 180Z 230Z 280Z 320Z 360Z 420Z 500Z 560Z 590Z 640Z 720Z 840Z 920Z 990Z 1110Z A E G F D M N

26 Analysis and Comparison Project Case Analysis and Comparison For example, there is a need of 700KW cooling load, and we choose OWCCL-G OWCCL OWCCL-Z to make a comparison: Parameter comparison for model selection: Scheme Initial Investment Comparison Scheme 1 Scheme 2 Scheme 3 OWCCL-740G OWCCL-700 OWCCL-720Z Cooling capacity KW 695.6KW 722.6KW Quantity of the principal machine Specification of the principal machine Cooling water system Chilled water system and terminals One set One set One set Q=741.6KW,P=253.2KW Cooling water pump(18.5)+ Tower fan(7.5)=26kw Q=695.6KW,P=223.6KW Cooling water pump(18.5)+ Tower fan(7.5)=26kw Q=722.6KW, P= =225.7KW (Included in the principal machine) Identical Identical Identical Total power =279.2KW =249.6KW principal machine225.7kw Energy efficiency ratio EER=741.6/279.2=2.66 EER=695.6/249.6=2.79 EER=722.6/225.7=3.20 Scheme Scheme 1 Scheme 2 Scheme 3 OWCCL-740G OWCCL-700 OWCCL-720Z Chiller price 664,000 Yuan 688,000 Yuan 825,600 Yuan Price comparison Cooling tower Surpass scheme one by Yuan Surpass scheme one by 161,600 Yuan, and scheme two by 137,600 Yuan 36,000 Yuan 36,000 Yuan None Cooling water pump 9000 Yuan 9000Yuan None Cooling water pipeline, valve, instruments and construction Chilled water system and terminals 30,000-50,000 Yuan (depending on the length of the pipeline) 30,000-50,000 Yuan (depending on the length of the pipeline) None Identical Identical Identical Power distribution investment Highest Second Lowest Comprehensive initial investment comparison(exclude the chilled water system and terminal) Operation Electric Charge Comparison 0 More initial investment than scheme1:24,000(power distribution excluded) More initial investment than scheme 1: (50000) =62600(42600)Yuan(power distribution excluded) Scheme Scheme 1 Scheme 2 Scheme 3 OWCCL-740G OWCCL-700 OWCCL-720Z Annual electric charge of the Refrigerating unit(including the cooling water) 279.2*300*20=1,675,200KW (calculation conditions:300 days operation annual and 20 hours operation daily ) 249.6*300*20= 1,497,600KW(calculation conditions:300 days operation annual and 20 hours operation daily) 225.7*300*20=1,354,200KW (calculation conditions:300 days operation annual and 20 hours operation daily) Annual electric charge 1,675,200KW 1.0 Yuan=1,675,200 Yuan (The electricity price is 1.0 Yuan/ kw.h ) 1,497,600KW 1.0 Yuan=1,497,600 Yuan (The electricity price is 1.0 Yuan/ kw.h ) 1,354,200KW 1.0 Yuan=1,354,200 Yuan (The electricity price is 1.0 Yuan/ kw.h ) Annual saved electric charge 0 The money saved comparing with scheme 1: 1,675,200-1,497,600=177,600 Yuan (Energy saving rate: 11.86%) The money saved comparing with scheme 2: 1,497,600-1,354,200=143,400 Yuan (Energy saving rate: 10.59%) The money saved comparing with scheme 1: 1,675,200-1,354,200=321,000 Yuan (Energy saving rate: 23.7%) 24

27 Analysis and Comparison Electric charge saved in 15 years 0 The money saved comparing with scheme 1: 177,600*15=2,664,000 Yuan The money saved comparing with scheme 2: 143,400*15=2,151,000 Yuan The money saved comparing with scheme 1: 321,000*15=4,815,000Yuan Operation Electric Charge Comparison Scheme OWCCL-740G OWCCL-700 OWCCL-720Z Whether Refrigerating machine room is needed? Special Refrigerating machine room is needed Special Refrigerating machine room is needed Special Refrigerating machine room is needed Environmental protection properties The cooling tower will produce water flying and noise pollution to the surroundings and additional the cooling water pumps produce more noise. The cooling tower will produce water flying and noise pollution to the surroundings and additional the cooling water pumps produce more noise. There is no water flying pollution or noise pollution, and the noise level is low without the use of high power cooling water pump. System installation Complicated. The cooling water system has to be installed on site by the construction teams with a lot of time and high cost. Welding slag and other foreign materials may be left in the cooling water system, affecting the normal operation of the system. Complicated. The cooling water system has to be installed on site by the construction teams with a lot of time and high cost. Welding slag and other foreign materials may be left in the cooling water system, affecting the normal operation of the system. Easy. The installation is easy, excluding the installation and commissioning of the cooling water system(cooling tower, cooling water pump, pipelines, valves, instruments) System working condition and service life. The service life of the principal machine is about 15 years, and the service life of the cooling tower is about years. The service life of the principal machine is about 15 years, and the service life of the cooling tower is about years. The adopted evaporation condensation technology makes the system work stably. The service life of the anti-corrosion high-thermal conductivity evaporative condenser is up to years. The maintenance of the cooling system It is easy for the cooling tower to form scale and breed moss and algae which can only be cleaned by chemical that will corrode the equipments and shorten the service life. A large sum of maintenance cleaning fee will be cost every year. It is easy for the cooling tower to form scale and breed moss and algae which can only be cleaned by chemical that will corrode the equipments and shorten the service life. A large sum of maintenance cleaning fee will be cost every year. The evaporative condenser with strong antiseptic treatment is adopted with a strong anti-scaling property and is easy to clean and maintain. After-sale service The system includes many parts from various of suppliers, which makes the after-sale service relationship relatively complicated The system includes many parts from various of suppliers, which makes the after-sale service relationship relatively complicated The system is supplied by a sole supplier, which makes the after-sale service very convenient. Scheme Summary After an overall evaluation of the above three schemes, the OWCCL-720Z refrigerating system is adopted as the principal machine, the advantages of which are: 1. The evaporative condensation technology is adopted. The condensing pressure of the unit is low, which decrease the input power of the compressor. The cooling tower and cooling water pump are not needed, reducing the power of mating equipment. All of these improve the energy efficiency ratio of the cooling system and make the system energy-saving. 2. The initial investment is a little larger than that of the OWCCL-740G OWCCL-700 but the saved operation electric charge is obvious. Through the comparison of the above schemes, we can see the cooling system adopting the evaporative low temperature cold water unit saves a lot of operating cost, and is the optimal scheme. 25