Wet Dry Thermometer

Heat Pump is a device to pump heat from one source to another. The heat obtained by heat pump is more than that could be obtained by direct electrical heating. The apparatus consists of refrigeration system with water cooled shell and coil type evaporator and condenser.

SPECIFICATIONS:

1.Compressor – Hermetically sealed compressor using R-12 refrigerant, having capacity 0.3 tons of refrigeration. Condensing pressure – max. 15 Kg/cm2 (Actual pressures will depend upon working conditions). 2.Condenser – Shell and coil type with continuous water flow arrangement. 3.Evaporator – Shell and coil type with continuous water flow arrangement. 4.Expansion Valve – Internally equalized thermostatic expansion valve. 5.Measurements – a) Rotameter for condenser & evaporator water flow rate measurement. b) Rotameter for liquid refrigerant flow measurement. c) Pressure gauges for condensing and evaporating pressure – 2 Nos. d) Thermometer for refrigeration cycle & water temp, measurement – 7 e) Wattmeter for compressor input measurement. f) Ammeter for compressor current measurement. 6.Controls – a) HP/LP cutout for compressor. b) Overload protector for compressor. c) Gate valve to control water flow rates. d) Necessary switches and fuse. A technical manual is accompanies the unit.

SERVICES REQUIRED:

1.Floor surface area – 2m, X 2m. X 1.5m. height. 2.220V. 15Amp. Single Phase Stabilized power supply.

Window air conditioner is becoming now a day’s necessity. The unit demonstrates the application of window air conditioner & evaluation of its performance. It consists of a small room to which a small air conditioner is connected the room is provided with a transparent front cover with a heater inside to simulate heat load in the room. Various measurements are provided so that performance of system that is COP of system, actual & theoretical cooling capacity of system & power consumption of unit with different load conditions.

SPECIFICATIONS:

1.Compressor – Hermetically sealed, Kirloskar make, having the capacity of 1/10 ton of refrigeration using R-12 refrigerant to keep room temperature between 20 to 30 c. 2.Condenser – Finned tube type, with forced air flow over the tubes, 3.Capillary tube of matched length as expansion device. 4.Evaporator – Finned tube type with forced air flow, 5.Room – 0.6 X 0.7 X 0.7 m. height, provided with transparent front wall. A heater with input control is provided inside the room. Which simulates different load conditions. 6.Measurements and Controls a) H.P. / L.P. Pressure gauges b) Digital temperature indicator to measure the temperatures at various points. c) Energy meters to measure input to compressor & heater. d) High and low pressure cutout. e) Thermostat to put off the compressor at set room temperature. f) Necessary switch for electrical components.

SERVICES REQUIRED:

1.Floor area of 2m X 1 m. 2.230V, 15AC stabilized supply with earthing connection

This charging unit is fitted with motorised vacuum pump and other safety devices like pressure gauge. With the help of this charging unit students can charge the refrigerant gases into compressor or store the gas of a refrigerator or air conditioner inside the cylinder fitted inside the charging unit that can be used later.

This model will be made out of original parts. The model will be suitably sectioned to demonstrate the internal construction details showing the minute information, and working of the same, the model will be suitably painted and mounted on a metal or wooden base & supplied with key card & very interesting literature regarding working of the same.