Expansion of Refrigeration Plant

Heavy duty industrial type reciprocating ammonia compressor, Kirloskar make, model PCX2, having capacity of 39800 KCal/hr. at minus 10 Deg.C. suction and 40 Deg C. discharge temperature while running at 900 RPM complete with suction and discharge manifolds with valves, safety valves, oil sight glass, pressure gauge, gauge board, flywheel, motor pulley, V belts, belt guard, tools, wrenches, anchor bolts and manual bye pass arrangements.

HP / LP cutout pressure switch.

ABB/NGEF/KIRLOSKAR/CROMPTON make 25 HP TEFC squirrel cage induction motor suitable for operation on 415 V., 3 ph., 50 cycles, AC supply at 1500 RPM having class `B’ insulation with IP-54 protection for driving the above compressor for continuous duty. Necessary slide rails and foundation bolts to be provided with motor.

Scrubber type ammonia oil separator of suitable size and of Kirloskar make.

Atmospheric type ammonia condenser each 50 NB dia x 6 M long and 12 pipes high of MS `C’ class pipes (TATA make) and C/W gas and liquid header, inlet and outlet valves, G.I. water sprinkling pipes with header, M.S. supports etc. (All condenser coils, liquid and gas headers, supporting structure shall be spray galvanized). All headers (gas, liquid and spray water) should be interconnected with the existing headers taking necessary precautions such that normal operations at the plant remains unaffected.

Suitable capacity (approx. size 500 mm dia x 1500 mm long) ammonia receiver C/W purge valve, safety valve, pressure gauge, drain valve, liquid gauge glass with valves and metal protector, including interconnection arrangement with the existing liquid receiver. Necessary equalization line for liquid and gas c/w valves, etc. as required. Thickness of plate for shell should be 12mm while for the Dish ends it should be 14 mm. (Detailed fabrication drg. to be got approved from the Milk Union before starting work).

Ice accumulating evaporator coil fabricated in one section out of 32 mm nominal bore M S `C’ class pipes (TATA make) having a total length of 270 mtrs, and finished with spray galvanizing after fabrication. The coils will be welded to accumulator (liquid separator) header, in single compartment, and provided with dial type thermometer, ice thickness thermostat (cut out) with solenoid valve.

Accumulator (liquid separator) of approx. size 350 mm dia x 1200 mm long C/W inlet and outlet connection and welded to the coil header, with one set of electronic float switch, strainer, solenoid valve and liquid bypass assembly. The accumulator should be properly insulated with polystyrene and duly cladded with Al sheet (22 gauge).

Chilled water tank of suitable size in one compartment/ equivalent size, fabricated with 6 mm thick MS plates for sides and partition walls and 8 mm thick for bottom with angle frame/ MS channel stiffeners for accomodating the ice accumulation coil. The tank should be painted with two coats of zinc rich paint. The tank will be provided with necessary drain connection with valve, overflow line and raceway for agitator. Approximate size of tank would be 4500 mm (L) X 1800 mm (W) X 2050 mm (H). However, before actual execution, fabrication drawings are to be got approved from Milk Union.

100 mm thick expanded polystyrene insulation and fixing materials for above chilled water tank. The walls of the chilled water tank will be insulated with normal density (16 kg/cu.m.) insulation and bottom with heavy density (20 kg/ cu.m.) insulation as per specification.