Description

AL-E1104 AIR TO AIR HEAT PUMP APPARATUS

Detailed Technical Specifications

Air–Air Heat Pump Trainer

Model AL-E1104

---------------------------------------------------------------------------------------------------------------------------------------1. General Description

The Air–Air Heat Pump Trainer is designed for the study and demonstration of the operating principles of an air-to-air heat pump and its refrigeration cycle. The trainer consists of a compressor, evaporator, condenser, expansion device, refrigerant piping, pressure gauges, a flow meter, temperature indicators, electrical controls, and a circuit diagram mounted on a panel.

The equipment is suitable for refrigeration and air-conditioning laboratories, polytechnic institutes, engineering colleges, and technical training centres.

2. Detailed Technical Specifications

Note: These specifications are based on the supplied image. Exact electrical ratings, refrigerant type, cooling/heating capacity, pressure ranges and instrument accuracy are not confirmed by the image.

3. Main Components and Functional Details

3.1 Compressor

The trainer incorporates a refrigeration compressor to circulate refrigerant through the system. It enables students to study the compression stage and observe the relationship between compressor operation, pressure and power consumption.

3.2 Evaporator

An air-cooled heat exchanger is provided as the evaporator. It facilitates heat absorption by the refrigerant and supports the study of evaporation and low-pressure-side operation.

3.3 Condenser

An air-cooled heat exchanger is installed on the opposite side of the trainer. It allows observation of heat rejection from the refrigerant and the condensation process.

3.4 Expansion Device

An expansion device is incorporated into the refrigeration circuit to reduce refrigerant pressure before it enters the evaporator.

3.5 Refrigerant Piping

Copper tubing, bends and fittings connect the major refrigeration components. The visible piping arrangement allows students to trace the refrigerant flow path and identify the individual sections of the cycle.

3.6 Pressure Gauges

High-pressure and low-pressure gauges are provided to observe the operating pressures of the refrigeration system.

3.7 Temperature Measurement System

Digital temperature indicators and associated sensors are provided for monitoring temperatures at designated points in the system.

3.8 Refrigerant Flow Meter

A flow meter is incorporated into the circuit for observing refrigerant flow, subject to the meter's specified operating range.

3.9 Electrical Power Measurement

A watt meter is provided to measure the electrical power consumed by the equipment during operation.

3.10 Electrical Control Panel

The front panel includes mains indication, compressor and fan ON/OFF controls, digital instruments, and a printed refrigeration-cycle diagram.

4. Scope of Learning

The trainer can support the following experiments, depending on the supplied instrumentation and operating procedure:

1.     Study of the basic principle and operation of an air–air heat pump.

2.     Identification of the main components of a refrigeration cycle.

3.     Study of the functions of the compressor, evaporator, condenser and expansion device.

4.     Measurement of high-side and low-side refrigerant pressures.

5.     Observation of temperatures at designated points in the refrigeration circuit.

6.     Measurement of electrical power consumed by the compressor and associated equipment.

7.     Observation of refrigerant flow using the installed flow meter.

8.     Study of the relationship between operating pressure, temperature and heat pump performance.

9.     Understanding of heat absorption at the evaporator and heat rejection at the condenser.

5. Construction and Safety Features

·        Rigid metal supporting frame with castor wheels.

·        Panel-mounted instruments and controls.

·        Clearly displayed refrigeration-cycle schematic.

·        Exposed copper piping for visual inspection and instructional demonstrations.

·        Dedicated compressor and fan controls.

·        Pressure and temperature monitoring instruments.

The equipment should be operated in accordance with the manufacturer's instructions. Refrigerant charging, servicing and pressure-circuit maintenance should be performed only by suitably trained personnel.

6. Standard Equipment Configuration

The supplied image indicates the following major components:

·        Air–Air Heat Pump Trainer, Model AL-E1104.

·        Refrigeration compressor.

·        Air-cooled evaporator and condenser.

·        Expansion device.

·        Copper refrigerant piping and fittings.

·        High-pressure and low-pressure gauges.

·        Digital temperature indicators.

·        Refrigerant flow meter.

·        Watt meter.

·        Electrical control switches and indicators.

·        Metal supporting frame with castor wheels.

Technical Details