Exclusivecompressor

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Jakarta 28-30 September 2017

MORETHAN

EMPLOYEES160 PRESENTIN80countries

PRODUCTIONCAPACITYOF

60000COMPRESSORSPERYEAR

ITALY,CHINA,USAANDINDIA

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ANADVANTAGE THESIZEOFTHEWORLD

81YEARS OFINNOVATION

Nationalandinternationalconsolidation1stgenerationofsemihermeticreciprocatingcompressors

Firstscrewcompressorsinstallations2ndgenerationofsemihermeticreciprocatingcompressors

NewproductrangesCompactscrewcompressors,CO2,integratedVFD

InaugurationofFrascoldINDIAinAhmedabadAndAustralianOfficeinSidney

Frascoldisfounded

81yearsofhistory

Andmoreyettocome…

1970s1936 Today1990s 20122000s 2014

InaugurationofFrascoldUSAinSeattleAndFrascoldChinainShanghai

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FRASCOLD SpAItaly (1936)

Frascold India(2012)

Frascold Shanghai(2014)

Frascold USA(2014)

Sales office(2012)

Frascold SpARescaldina (MI)Headquarters and production

Frascold IndiaAhmedabadCond. unit assembly and warehouse

Frascold ShanghaiShanghaiSales office and warehouse

Frascold USASeattleSales office and warehouse

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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

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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  

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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)

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Reciprocating Compressors

Standard Reciprocating Compressors Optimized for R134a

SK Models Sub‐CriticalCO2 Application

TK Models Trans‐Critical CO2 Application

Two Stage Compressors For Low Temp Application

Tandem Compressor Models

VS Compressor Models with Built‐In VFD

Transport Compressors

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SEMI HERMETIC COMPRESSORS

RECIPROCATING

Single stage

CO2 subcritical – 80 bar

CO2 transcritical – 155 bar

ECOinside (optimized R134a) 

VS (built‐in VSD)

AXH and AXY (ATEX)

Double stage

Tandem

TS (transport)

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New Capacity control

New Capacyti control

New Capacity control

New Capacity control

New Capacity control

New Capacity control

Reciprocating Compressors

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 Tevap. 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 Tevap. .

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Exclusive and innovative Capacity Control

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How standard capacity control  works?

Exclusive and innovative Capacity Control

0% Displacement

100% Displacement

‐ Vacuum effect‐ Unbalancing

STANDARD CC HEAD

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Exclusive and innovative Capacity Control

13

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

Case 1: Reducing n° of start / hour

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Exclusive and innovative Capacity Control

14

Given Tmax and Tmin, 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 Tcond

Case 1: Reducing n° of start / hour

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Exclusive and innovative Capacity Control

15

compressor ON‐OFF

6 start/hour OK Very short running time

Large Temperature variation 

Low Tmin → Low Tevap (Tmin ‐14°F)

compressor1 with Capacity Control

6 start/hour OK Longer running time

Smaller temperature variation 

Higher Tmin → Higher Tevap

Case 2: improving efficiency

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Exclusive and innovative Capacity Control

16

With Capacity regulation is possible to reduce 

variation of room temperature.

Given Tmax is possible to increase Tmin Tevap = Tmin – evaporator’s ∆T

→ Regulating capacity is possible to increase Tevap

@‐35°C/45°C:   Tevap ↑1.8°C  ↔  COP ↑ 4%Tevap ↑3.6°C ↔   COP ↑ 6% Tevap ↑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 Tcond

Blueis better

Exclusive and innovative Capacity Control

LESS compressor On‐Off cycles

FEATURES & PRO’s

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Exclusive and innovative Capacity Control

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 150‐160 °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 closedNO oil return Blueis better

Exclusive and innovative Capacity Control

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.

• 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

Brokendischargereed 

Brokengasket

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Exclusive and innovative Capacity Control

RSH HEAD

50% Displacement

100% Displacement

‐ Operating Pressure‐ More balanced

Blueis better

Exclusive and innovative Capacity Control

LESS compressor On‐Off cycles and  BETTER system efficiency

FEATURES & PRO’s

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Very constant evaporatingtemperature (green line)

Exclusive and innovative Capacity Control