This machine can be sold in parts as either a block to be as a bare compressor to be utilized as boosters (for a typical meat processing plant) or as a complete refrigeration unit 

1.         Application      Glycol Chilling

 2.         Refrigerant      Ammonia

 3.         System Gravity - Flooded

 4.         Fluid to be chilled

            45% by weight Mono Ethylene Glycol solution

 5.         Fluid inlet temperature to chiller       -150C

 6.         Fluid outlet temperature from chiller -200C

 7.         Specific heat of fluid   1.07571

 8.         Density of fluid           3.2818 KJ/(Kg K)

 9.         Cooling water supply temperature     320C

 10.       Condensing temperature        400C

 11.       Fouling factor in shell & tube condenser

            0.0004 hr-sq-m oC/Kcal

 12.       Area margin in PHE evaporator          10%

 13.       Electric power supply 11000V + 10%, 50 Hz + 3%, 3 ph

 14.       Electric control supply 220V, 50 Hz, 1 ph AC supply

 15.       Area classification       Safe

 Sr. No.  Qty.     Description

1.0       1 Nos.  Refrigeration Equipment of 350 TR capacity, each consisting of:

 1.01     1 No.

            High Stage Refrigeration Compressor Unit  

 JCI-York, make Rotary Screw Compressor Unit Type RWF II 399E for high stage application.

 Data for compressor:                                                    Number of revolutions: 2950 rpm                                    

Refrigeration capacity of compressor: 1262.4 kW (359 TR)

Shaft power: 562.7 kW

Evaporating temperature: -25OC

Condensing temperature: +40OC

Suction line superheat: 5OC

Suction line pressure drop: 0.03 bar

Discharge line pressure drop: 0.2 bar

 The same compressor gives capacity of 1316.5 kW (374.4 TR) at a condensing temperature of 16OC.

 The unit is inclusive of all internal piping and electric wiring and inclusive of the following main components:

  Rotary Screw Compressor.

Casting is close grain, cast iron to ensure structural integrity and mechanical and thermal stability under all operating conditions.  The rotors are machined from bar stock to the exacting tolerances of the latest SRM asymmetric profile.

  Variable capacity control 100% - 10% by use of a movable slide valve.

  Suction and discharge line stop valves

   Suction and discharge line check valves

   Internal suction strainer

   Drive coupling and coupling guard

    Lubrication system:

The compressor is designed specifically for operation without an oil pump under normal operating conditions. All oil required for lubrication is provided by positive gas differential pressure. 

    Oil separator / Reservoir.

    Three-stage horizontal oil separator/ reservoir with coalescent       separator elements. Oil separator is supplied with Dual safety valve      Electric heater in oil separator

   Oil Cooler:

Water -cooled shell and tube type oil cooler. (77m3/h of cooling water at 32 deg C to be circulated across oil cooler).

    Single oil filter designed for vertical mounting and furnished with isolation stop valves and drain connections for ease of servicing.

    Refrigeration controls for compressor module comprising of:

1 No.   Suction Pressure transducer

1 No.   Discharge pressure transducer

1 No.   Oil Pressure transducer before oil filter.

1 No.   Oil Pressure transducer after oil filter.

1 No.   Heater in oil separator.

1 No.   Level switch in oil separator.

2 Nos. Capacity control solenoid valves.

1 No.   Capacity position sensor.

1 No.   Temp. Sensor for discharge gas.

1 No.   Temp. Sensor for oil after oil cooler.

1 No.   Temp. Sensor for suction gas.

1 No.   Temp. Sensor in oil separator.

  Quantum LX control panel:

     The Quantum control panel is provided for automatic control and setting of correct volume ratio, according to actual running conditions. Furthermore, for necessary safety controls and display readings of temperatures and pressures.

     The Quantum LX control panel is factory mounted, completely piped and wired with all the required safety and operating devices. A built-in telecommunications interface suitable for connection to remote computer, terminal printer or standard modem is included.

The entire package unit comprising of screw compressor, coupling, oil cooler and interconnection oil piping, necessary control wiring shall be mounted on a common base frame.

1.02     1 No.

            BHEL/Marathon/ ABB/ equal make 625 kW, 2 pole, TEFC, squirrel cage induction motor as per IEC standard. The motor is suitable for operation on 11kV, 50 cycles per second, 3 phase, AC supply.

1.03     1 No.   Shell and tube type condenser:

                        Heat rejection :           1480 kW

                        Cooling water inlet temp.       :           32 deg C

                        Cooling water outlet temp.    :           36 deg C

                        Condensing temperature        :           40 deg C

                        Water flow rate           :           318.2 m3/hr

                        Shell material  :           SA 516 Gr. 70

                        Tube material  :           SA179 seamless

1.04     1 No.   Ammonia liquid receiver of suitable capacity. The receiver will be fabricated out of IS2062 plates.

1.05     1 No.   Brazed PHE/ S&T type DX economizer of suitable capacity.

1.06     1 No.   Semi-welded plate type ammonia evaporator – glycol chiller:

                        Make   :           Alfa Laval/ GEA Ecoflux

                        Fluid to be chilled       :           45% by wt. MEG solution

                        Chilled glycol inlet temp.        :           -15 deg C

                        Chilled glycol outlet temp.      :           -20 deg C

                        Evaporating temperature       :           -25 deg C

                        Brine quantity :           257.2 m3/hr

                        Plate material :           AISI 316, 0.6mm thick

                        Frame  :           Mild steel

1.07     1 No.   Surge drum of suitable size for above chiller. The surge drum will be fabricated out of IS2062 plates.

1.08     1 No.   Oil pot for automatic oil return arrangement.

1.09     1 Lot    Refrigeration controls and valves comprising of:

                        For Each Condenser

1 No.   Stop Valve at inlet

1 No.   Stop Valve at outlet

1 No.   Safety Valve

                        For Each Receiver

1 No. Stop valve at inlet

1 No. Stop valve at outlet

1 No. Safety valve

1 No. Pressure gauge

1 No. Level gauge

1 No. Drain valve

1 No. Purge valve

                        For Each Economizer

1 No. Stop valve at inlet

1 No. Stop valve at outlet

1 No. Safety valve

1 No. Pressure gauge

1 No. Thermostatic expansion valve

1 No. Pilot solenoid valve

                        For Each Plate type Chiller & Surge drum

2 No. Stop valve in liquid line

1 No.  Safety valve

1 No.  Liquid line strainer

1 No.  Liquid line solenoid valve.

1 No.  Regulating valve

1 No.  Electronic Float Switch

                        For Each Oil return arrangement

2 Nos. Solenoid valves

1.10     1 Lot    Refrigeration instruments comprising of:

                        A) For oil cooler

                        Temperature gauges for cooling water in /out           2 Nos

                        Pressure gauges for cooling water in /out      2 Nos

                        Flow  switch for cooling water flow low         1 No

                        B) For condenser

                        Temperature gauges for cooling water in /out           2 Nos

                        Pressure gauges for cooling water in /out      2 Nos

                        Flow  switch for cooling water flow low         1 No

                        C) For Plate type chiller

                        Temperature gauges for water in /out           2 Nos

                        Pressure gauges for water  in /out     2 Nos

                        Flow switch for Chilled water flow low           1 No.

1.11     1 Lot    Ammonia   piping & fittings   to interconnect   the various   refrigeration equipment such as compressor, condenser, Receiver, Evaporators, Surge drum etc. The pipes shall be as per SA 106 seamless.

The pipe specifications shall be:

 SCH 80 for 15, 20, 25, 32 & 40mm sizes

 SCH 40 from 50 mm to 150mm

 SCH 20 from 200mm & above size.

1.12     1 Lot    Thermal insulation of expanded polystyrene for surge drum and suction line. The insulation will be covered with 22G aluminium cladding.

1.13     1 Lot    M.S. structural supports for mounting condenser, chiller, receiver, etc.

1.14     1 Lot    Control cabling to connect instruments in our scope of supply to the control panel.