Refrigeration Plant Equipment

            REFRIGERATION PLANT EQUIPMENT

The refrigeration plant shall be basically for the chilled water system and cold store  . The lists of equipments/items are given below.

AMMONIA COMPRESSOR ( KC-6 Model ) – 4 NOS ( 3 working and One Stand By )

The compressors shall be supplied  with following accessories.

·         Automatic unloader, capacity controller

·         Suction and discharge manifolds with isolating valves

·         Pressure safety relief valve

·         Floor mounted control panel with cutouts for high pressure, low pressure, oil pressure

·         Differential gauges for high pressure, low pressure, oil pressure

·         Oil sight glass.

·         Complete driving parts with belt guards.

·         Base frame, anchor bolts, vibration eliminators

·         Standard tool kit.

MOTORS OF COMPRESSORS – 4 NOS.                                            

TEFC induction motor (IP 55) horizontal foot mounted 4 pole suitable for 415 volts, 50 Hz, 3 Phase, A.C., suitable for continuous duty  of the compressor along with necessary slide rail, foundation bolts etc. The motors shall be of 150 hp.

OIL SEPARATOR – 4NOS.

Suitable for the compressor capacity, provided with counter flange, float valve and strainer with automatic return of oil to the crankcase of compressor/oil drain line.

SEMI WELDED SS PLATE TYPE CONDENSER – 4 NOS. ( 3W+1SB

The condenser shall be made of semi welded SS plate of reputed make including , self supported MS Frame with  Ammonia vapour inlet liquid ammonia outlet, cooling water inlet and outlet, FRP cooling tower and suitable arrangement for periodic cleaning of water scales formed between the plates will be supplied .

CONDENSER PUMP – 4 NOS. ( THREE NO WORKING AND ONE NO STAND BY )

Centrifugal, mono block pump with bronze impeller 15 hp TEFC squirrel cage induction motor (IP 55 ) suitable for 3 phase, 415 V, 50 Hz. A.C. supply. The pumps should be installed on common base frame. GI Sheet cover is to be provided for each pump.

AIR PURGER – 1 NO

Suitable air purger is to be provided and installed at the discharge pipe before entry to condenser. The purger should be complete with valves, fittings and standard accessories.

AMMONIA RECEIVER – 2 NOS.   

Ammonia receiver shall be fabricated out of 15 mm thick  MS plates for the shell and dish ends. Receiver shall be 900 mm Dia x 6000 mm Length . Following accessories shall be provided on the receiver.

·         Liquid inlet and outlet valve

·         Air purging valve

·         Charging hose pipe with connections

·         Liquid level gauge enclosed in metal casing

·         Safety Valve

·         Pressure  Gauge  with isolating Valve

·         Liquid  equalizing connection

ICE BANK COILS – 1 SET  

The coils should be fabricated from 32 mm diameter MS ‘C’ Class ( heavy duty ) pipes with inlet and outlet headers and oil drain arrangement . The coil should be able to accumulate maximum 50 mm  thick ice. The maximum height of the coils shall  be 2.5 mtrs. Total  coil length shall be minimum 9000 meters including headers.

ICE BANK TANK – 4 NoS

Approximate size of the tank 7.5 x 7  x 2.5Mtrs to accommodate the ice bank coils and to meet the functional purpose of providing chilled water. The IBT should be in two independent section.  The tank should be  provided with partitions acting as barrier and guide for incoming and outgoing  water. Tank shall be made from MS plates, angles, channels etc.

Tank Bottom                                 8 mm thick

Tank sides and partition walls      6 mm thick

Stiffeners should be sufficient to prevent bulging. MS angles to be provided over the tank, for placing PUF covers. Overflow and drain pipes with valves to be provided.

LIQUID SEPERATOR ( ACCUMULATOR ) – 4 NOS.

The liquid separator shell be made out of 10 mm MS Sheet. This shall be complete with electronic float valve, strainer by pass arrangement for regulating the flow of liquid refrigerant in the ice bank coils and sending the ammonia vapors to compressors.

I.B.T. COVER    - 1 Set    

Removable PUF Panel covers suitable for indoor location shall be provided in panels, covering the entire top surface of the tank in the following manner.

 I.B.T. AGITATOR – 4 NOS.  

An impeller type agitator shall be installed in the ice bank tank for water circulation during building and melting of ice. The agitator shall be driven by 5 hp electric motor (IP 55), 3 phase, 50 Hz, AC 1440 rmp, foot mounted .

CHILLED WATER PUMPS – 3 NOS.  

Centrifugal , monoblock pump 25 HP with bronze impeller complete with base frame, G.I. Cover etc.

LIQUID AMMONIA & OIL     - 1 LOT   

The first charge of ammonia and compressor oil should be supplied during commissioning .

INSULATING MATERIAL    

I.B.T. – At the bottom 100 mm thick H.D. polystyrene of density 18 kg/cu m in 2 layers 50

              mm  thick with bitumen layers.

At sides, 100 mm thick N.D. polystyrene of density 16 kg/cu m in 2 layers 50 mm 

thick with bitumen layers.

Accumulator – All sides, 100 mm thick N.D. Polystyrene of density 16 Kg/cu m in 2 layers

                        50 mm thick with bitumen. Cladding with aluminum sheets.

Suction pipes – 50 mm thick standard insulation pipe sections to be fixed with bitumen and cladded with aluminum sheets.

AMMONIA PIPE & FITTINGS – 1 SET  

MS ‘C’ Class Pipe, ammonia fittings & valves for inter connecting the different items in the plant.

WATER PIPE & FITTINGS – 1 SET   

GI ‘B’ Class Pipe to provide water at different points of consumption  .

ELECTRICAL PANEL & CABLING– 1 SET   

ERECTION & COMMISSIONING  – 1 SET