Mechanical Heat Pump Apparatus

Product Description

Description of DIDAC Mechanical Heat Pump Apparatus:

The components of the heat pump and its instrumentation are mounted on a high quality ABS plastic panel.

The Mechanical Heat Pump consists of a hermetic compressor, an insulated coiled concentric tube water cooled condenser, a liquid receiver, a thermostatically controlled expansion valve and air heated evaporator.

Mechanical Heat Pump components are clearly but compactly arranged in a manner similar to that used for many domestic air-water heat pumps and all are visible from the front of the unit.

The operating cycle is as follows:

Slightly superheated Refrigerant vapour enters the compressor from the evaporator and its pressure is increased. This brings about a rise in temperature and the hot vapour enters the water cooled condenser. Mechanical Heat Pump is given up to the cooling water and the refrigerant condenses to a liquid before passing to the liquid receiver and then the expansion valve.

Experimental Capabilities of Mechanical Heat Pump Apparatus:

1. Determination of power input, heat output and coefficient of performance.
2. Production of heat pump performance curves over a range of source and delivery temperatures.
3. Plotting the vapour compression cycle on a p-h diagram and comparing this with the ideal cycle.
4. Determination of energy balances for condenser and compressor.
5. Production of heat pump performance curves based on properties, at a variety of evaporating and condensing temperatures.
6. Estimation of the effects of compressor pressure ratio on volumetric efficiency.

Specification of Mechanical Heat Pump Apparatus

A fully instrumented bench top air to water heat pump operating on the mechanical vapour compression cycle with Panel: High quality ABS plastic panel on which the following components are mounted.

1. Refrigerant
2. Compressor: Fully hermetic single cylinder reciprocating type. Displacement 8.85 cm3 rev-1
3. Condenser: Refrigerant to water. Insulated coiled concentric copper tube type.
4. Liquid Receiver: With valves. Contains entire refrigerant charge if required.
5. Evaporator: Air to refrigerant. Serpentine copper tube with aluminium fins and with integral fan.
6. Digital Thermometer: Resolution 0.1ºC, with switch to select from six thermocouples.
7. Flow Meters: Variable area type – to indicate flow rates.
8. Pressure Gauges: To indicate pressures in evaporator and condenser.
9. Electrical Energy Meter: Watt-hour type recording electrical input to the compressor.