Heat Pump for Cooling and Heating Teaching Equipment

Refrigeration systems and heat pumps can have the same basic design, with their application determining whether they are used for cooling or heating. The system allows both cooling and heating operations to be studied through different practical operating modes.

Different operating modes can be selected using solenoid valves. The refrigeration circuit includes a compressor, heat exchanger with fan, two fan-assisted evaporators for refrigeration and freezing stages, and thermostatic expansion valves. The two evaporators can be connected either in parallel or in series. For series operation, a capillary tube serves as the expansion element for the refrigeration-stage evaporator.

The refrigeration circuit is connected to a glycol-water circuit through a coaxial coil heat exchanger. The heat exchanger can be operated as either an evaporator or condenser using solenoid valves, allowing the glycol-water mixture in the tank to be heated or cooled. During cooling-only operation, the fan-assisted heat exchanger dissipates heat as an air-cooled condenser and can also be switched to operate as an evaporator.

Measured values such as temperature, pressure, flow rate and compressor power consumption are displayed digitally and can be transmitted directly to a PC for analysis. The included software supports convenient analysis and graphical representation of the process. Refrigerant condition data can also be used to accurately calculate the refrigerant mass flow rate.

Manufactured by Atico Export with a focus on precision, durability and consistent performance for technical education and practical training applications.

Specifications :

• Different operating modes selectable through solenoid valves
• Refrigeration circuit with compressor, fan-assisted heat exchanger and two fan-assisted evaporators
• Refrigeration and freezing stages
• Glycol-water circuit with tank, pump and coaxial coil heat exchanger
• Coaxial coil heat exchanger and fan-assisted heat exchanger can operate as condenser or evaporator
• Thermostatic expansion valve provided for the heat exchangers and evaporators
• Additional evaporation pressure controller and capillary tube for the refrigeration-stage evaporator
• Digital displays for temperature, pressure, flow rate and compressor power consumption
• Precise refrigerant mass flow rate calculation through software
• Data acquisition and analysis through Ethernet connection

Technical Details :

Compressor :

• Refrigeration capacity: 1561 W at 5/40°C
• Power consumption: 759 W at 5/40°C

Heat Exchanger with Fan :

• Transfer area: 1.5 m²
• Volumetric air flow rate: 680 m³/h

Evaporator with Fan – Refrigeration Stage :

• Transfer area: 1.21 m²
• Volumetric air flow rate: 80 m³/h

Evaporator with Fan – Freezing Stage :

• Transfer area: 3.62 m²
• Volumetric air flow rate: 125 m³/h

Refrigerant :

• Type: R134a
• GWP: 1430