GEA Air Handling Units Modular configuration Integrated refrigeration with optimized energy efficiency GEA CAIRplus Product Brochure engineering for a better world GEA Heat Exchangers
Tailored climate control from a one-stop supplier [Air flow ratings of 3,000 to 60,000 m³/h] [Great energy efficiency] [Refrigerant: R134a] Optimal performance results from integrated control systems ww Integrated refrigeration and control technology GEA CAIRplus air-handling systems Benefits No external piping For indoor or outdoor installation One-stop supplier Low energy consumption Simple installation Air flow from 3,000 to 60,000 m³/h Great energy efficiency, since operation is always with heat recuperation Space-saving Tailored climate control with minimized energy consumption throughout the entire life cycle: this pays off in comfort, in enhanced productivity and in cold cash. GEA air-handling systems with integrated refrigeration are virtually completely ready to be connected, and all their components feature optimal inter-coordination. They have proved exceptionally popular owing to their integrated control systems and their highly efficient energy recuperation. Direct-evaporator technology with R134a as refrigerant achieves great reliability and long service life. GEA CAIRplus systems are absolutely reliable in operation, even at high outdoor temperatures. The output of these systems can be continuously matched to refrigeration demand. In addition, an option is also available for adiabatic evaporative cooling to achieve minimized energy consumption. All refrigeration components, as well as the control system, are integrated in the system. [2]
Everything from GEA as one-stop supplier An overview of integrated refrigeration The refrigeration cycle Heat exchanger as a direct evaporator and refrigerant condenser R134a as refrigerant Semi-hermetic compressor (pistons for up to 100 kw cooling duty, with screw compressors for greater duty) Control of output by cylinder switch-off and frequency inverters Control range of 30 to 100 % of the maximum cooling duty (optional: 10 to 100 %) The refrigerant R134a Good thermal and energetic characteristics No temperature glide Low condensation pressure and high condensation temperatures >60 C are possible Reliable heat removal by high condensation temperatures Quiet operation, great operational security Low energy consumption Low global warming potential (GWP) No ozone depletion potential The adiabatic extracted-air cooling unit, available as option, reduces the cooling duty required of the refrigeration system, and improves the efficiency of the refrigeration cycle. The control system The control cabinet, integrated into the unit, is completely wired Control functions by the Matrix 4700 Optional LON-bus interfacing Alternatively available in an external control cabinet [3]
Performance range The optimal unit for each and every application and installation site Unit parameters for integrated refrigeration Configuration: one unit above the other Unit parameters for integrated refrigeration Cooling duty for one unit above the other Air flow in m³/h Output in kw Unit parameters for integrated refrigeration Configuration: one unit next to the other Unit parameters for integrated refrigeration Cooling duty: one unit next to the other Air flow in m³/h Output in kw [4]
Examples of configuration All possibilities offered by modular system configurations Refrigeration unit installed on the extracted-air side Energy recuperation with rotation heat exchanger Supply and extracted air configured one over the other Refrigeration unit outside the air flow Energy recuperation with rotation heat exchanger Supply and extracted air configured one next to the other [5]
Sorption rotors and adiabatic cooling Additional possibilities for energy saving Only sensible heat recuperation Savings: Approx. 17 % Sorption rotor with additional moisture recuperation Savings: Approx. 40 % Water-vapor content in g/kg Water-vapor content in g/kg Sorption rotors: In moist climate zones, or in cases in which the outside air must be additionally dehumidified, sorption rotors are effective for energy recuperation. These systems exploit situations in which the extracted air is dryer than the outside air, in order to extract moisture from the outside air and to relieve the burden on the refrigeration unit. Around 40 % of the energy needed for refrigeration can be saved this way, depending on location and operational modes. Sensible refrigeration recuperation, with aftercooling by 9 C Adiabatic cooling, with aftercooling by 5 C Air temperature in C Air temperature in C Air temperature in C Air temperature in C Water-vapor content in g/kg Water-vapor content in g/kg Adiabatic cooling: In relatively dry regions, adiabatic extracted-air cooling can lower energy consumption. This solution provides maximum moisture to the extracted air in a humidifier, which results in cooling. This cooled air absorbs heat from the warm outside air via heat recovery, and thereby cools the outside air. [6]
GEA Lplus engineering-design software and high hygienic standards Optimally designed, tested, and certified GEA CAIRplus air-handling units are characterized by their great number and variety of models, which provide a tailored solution for each task required and for each building situation. The software GEA Lplus individually designs each unit. The GEA Lplus engineering-design software covers all products from GEA Air Treatment. The free complete version can be downloaded in the Internet from www. gea-airtreatment.com under the menu items Media/Download/Lplus software. Or, you can order it from us (see address at the pyramid below). GEA Lplus engineering-design software Tested and certified data for maximum reliability. The directives EN 13053 and EN 1886 establish testing criteria for central air-handling units. These characteristics are regularly checked by independent testing institutes. Eurovent tests and certifies observance of the performance data provided in the software. In the conception and structural engineering of GEA CAIRplus central air-handling systems, great importance is placed on a design that would assure high hygiene standards. GEA CAIRplus units are completely smooth on the inside. No edges or bolts impede full-surface cleaning of the unit. With more stringent hygiene requirements for example, in public-health building and facilities additional requirements must be met, as stipulated in DIN 1946, Part 4. GEA CAIRplus central airhandling units likewise satisfy these stricter requirements. The following standards and directives describe hygiene requirements placed on air-treatment systems: VDI 6022, Sheet 1 Hygiene requirements placed on room air-treatment plants and units DIN EN 13779 General fundamentals and requirements DIN 1946, Part 4 Room air-treatment systems in hospitals VDI 3803 Building and engineering requirements Eurovent awards Energy Efficiency Labels A to F, whereby units with Label A demonstrate greatest efficiency. The RLT Manufacturers Association for Air Treatment awards efficiency labels A+, A, and B. Systems that do not satisfy all requirements do not receive a label. Institute for tested RLT-Hygiene 2009-2012 Air Hygiene Hygiene-relevant standards VDI 6022 (D) VDI 3803 (D) ÖNORM H 6021 (A) SWKI VA104-01 (CH) DIN EN 13779 (EU) DIN 1946 Part 4 (D) SWKI 99-3 (CH) ÖNORM H 6020-1 (A) tested by ILH BERLIN [7]
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