Mechanical Heat Pump Trainer

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

The unit consists of vapor compression refrigeration cycle provided with components normally used in refrigeration system so that student can get familiar with the components. Various measurement provided enable students to estimate the performance of the system.

SPECIFICATIONS:

1.Compressor- Hermetically sealed compressor, having capacity of 0.3 T. 2.Expansion Devices a) Thermostatic Expansion Valve b) Capillary tube. 3.Evaporator coil. 4.Controls: a) Services Valve b) Solenoid Valve c) Filter-Drier for refrigerant d) High/Low pressure cutout e) Thermostat. 5.Measurements: a) Thermometers (mercury in glass) – 4 Nos. b) Pressure gauges for condensing and evaporating pressure. c) Energymeter for compressor d) Voltmeter and Ammeter for compressor. e) Rotameter for liquid refrigerant flow measurement. A technical manual is accompanies the unit.

SERVICES REQUIRED:

1.Floor surface area – 1m x 2m x 2m height. 2.220V, I5Amp, Single Phase Stabilized power supply

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.

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.