Blue is better. Exclusive. compressor

Transcription

1 Exclusive compressor Jakarta September 2017

2 MORE THAN 160 EMPLOYEES PRESENT IN 80 countries ITALY, CHINA, USA AND INDIA PRODUCTION CAPACITY OF COMPRESSORS PER YEAR

3 AN ADVANTAGE THE SIZE OF THE WORLD 81 YEARS OF INNOVATION s 1990s 2000s Today Frascold is founded National and international consolidation 1st generation of semihermetic reciprocating compressors First screw compressors installations 2nd generation of semihermetic reciprocating compressors New product ranges Compact screw compressors, CO2, integrated VFD Inauguration of Frascold INDIA in Ahmedabad And Australian Office in Sidney Inauguration of Frascold USA in Seattle And Frascold China in Shanghai 81 years of history And more yet to come

4 Frascold SpA Rescaldina (MI) Headquarters and production FRASCOLD SpA Italy (1936) Frascold Shanghai (2014) Frascold USA (2014) Frascold India Ahmedabad Cond. unit assembly and warehouse Frascold India (2012) Frascold Shanghai Shanghai Sales office and warehouse Sales office (2012) Frascold USA Seattle Sales office and warehouse

5 Main Customers and References Stationary Refrigeration TEKO (Germany) Racks and condensing units Zanotti (Italy, Spain, UK) Racks and condensing units Rivacold (Italy) Racks and condensing units Tecumseh (FR, Indonesia, Brasil, USA) Condensing Units Carpigiani (Italy) Ice Cream Machine Comfort Euroklimat (Italy) Chillers Jonhson Controls (DK) Chillers Kirloskar (India) Chillers Thermocold (Italy) Chillers Rhoss (Italy) Chillers RC Group (Italy) Chillers Geoclima (Italy) Chillers

6 Main Customers and References Mobile Cooling Thermo King (Spain, USA, Brazil) Refrigerated trucks Carrier Transicold (France) Refrigerated trucks Zanotti (Italy) Refrigerated trucks Cold Car (Italy) Refrigerated trucks Transfrig (South Africa) Refrigerated trucks Siemens (Belgium) Train A/C Carrier (Korea) Train A/C 6

7 Branded Compressors Thermo King (Semi hermetic and open reciprocating compressors) Tecumseh (Semi hermetic reciprocating compressors) Carrier (Semi hermetic reciprocating compressors) Carrier Transicold (Semi hermetic reciprocating compressors) Kirloskar Chillers (Semi hermetic compact screw compressors) Lebrun (Semi hermetic compact screw compressors) 7

8 Reciprocating Compressors Standard Reciprocating Compressors Two Stage Compressors For Low Temp Application Optimized for R134a SK Models Sub Critical CO2 Application TK Models Trans Critical CO2 Application Tandem Compressor Models VS Compressor Models with Built In VFD Transport Compressors

9 Reciprocating Compressors RECIPROCATING SEMI HERMETIC COMPRESSORS Single stage CO2 subcritical 80 bar New Capacity control New Capacity control CO2 transcritical 155 bar ECOinside (optimized R134a) VS (built in VSD) AXH and AXY (ATEX) New Capacyti control New Capacity control New Capacity control TS (transport) Double stage Tandem New Capacity control

10 GENERAL CONCEPTS Systems are designed to satisfy the maximum cooling capacity that could occur, so for most of the operating time systems are over dimensioned The capacity could be reduced switching OFF periodically the compressor but there are limitations: max switch rate: 8 10/hour minimum running time 2 5 min. These limitation brings to large temperature deviation in the room The system has to cool down the room enough to guarantee that during compressor standstill (6 min cycle time) the temperature can t rise over the maximum acceptable temperature, to do this lower T evap. is required Lower evapora ng temperature lower COP of the compressor The possibility to regulate capacity permit to keep the compressor in operation for longer time and to operate at a higher T evap.. 10

11 How standard capacity control works?

12 0% Displacement 100% Displacement Vacuum effect Unbalancing STANDARD CC HEAD

13 Case 1: Reducing n of start / hour compressor ON OFF 12 start/hour TOO MANY!!! Out of Compressor limits! Very short running time Temperature variation can t be increased compressor1 with Capacity Control 10 start/hour OK Less compressor starts Longer running time 13

14 Case 1: Reducing n of start / hour Given T max and T min, with Capacity regulation is possible to: increase continuous running time reduce starts/hour Reduced electrical stress at start up Reduced mechanical stress at start up Better oil return to the compressor Secondary effect: at partial load the load on condenser is less With Capacity regulation (and floating condensing temp) is possible to reduce T cond 14

15 Case 2: improving efficiency compressor ON OFF 6 start/hour OK Very short running time Large Temperature variation Low T min Low T evap (T min 14 F) compressor1 with Capacity Control 6 start/hour OK Longer running time Smaller temperature variation Higher T min Higher T evap 15

16 With Capacity regulation is possible to reduce variation of room temperature. Given T max is possible to increase T min T evap = T min evaporator s T Regulating capacity is possible to increase T 35 C/45 C: T evap 1.8 C COP 4% T evap 3.6 C COP 6% T evap 5.4 C COP 10% Secondary effect: at partial load the load on condenser is less With Capacity regulation (and floating condensing temp) is possible to reduce T cond 16

17 FEATURES & PRO s LESS compressor On Off cycles

18 Capacity Control Problems Traditional Capacity Controls operates closing completely the suction flow to the cylinders under the CC head. This can cause several problems that can cause serious consequences: Overheating The refrigerant trapped into the cylinders is continuously expanded and compressed increasing gradually its temperature No temperature monitoring because these cylinder has no discharge flow Over C POE oil vaporize and parts start wearing; over 170 C POE oil carbonize and create contaminants increasing wearing of parts Worn piston and piston rings permit high pressure bypass to the crankcase closing oil check valve and interrupting oil flow back from the system High pressure in crankcase Oil check valve closed NO oil return 18

19 Capacity Control Problems Vacuum operation Every cycle the piston movement create vacuum into the cylinder but suction reed don t open (no suction flow) Vacuum suck oil from cylinder liners and accumulate it into the cylinder. Broken discharge reed Oil accumulation can lead to liquid slug and damage or broke the discharge reed or the valve plate gasket Broken parts will end up in compressor malfunctioning Broken gasket 19

20 50% Displacement 100% Displacement RSH HEAD Operating Pressure More balanced

21 FEATURES & PRO s LESS compressor On Off cycles and BETTER system efficiency Very constant evaporating temperature (green line)