Refrigeration Cycle and Heat Pump

MODEL：BORACS-04

1. Scope of Supply:

Provide, deliver, install, test, commission, and deliver a complete refrigeration cycle and heat pump training system (including HMI), comprising: a fully functional refrigeration and reverse cycle heat pump system; a programmable HMI touchscreen control system; an RFID power management system; complete instrumentation and control panels; standard accessories, tools, and documentation. The equipment is assembled, tested, and delivered at the factory for immediate use in teaching.

2. Overview:

This system is designed for advanced vocational training in refrigeration and heat pump technology. It allows for: operation in forward refrigeration and reverse heat pump modes; practical wiring and electrical control circuit training; observation of refrigeration components and system status; performance analysis and comparison of refrigeration and heating cycles; calculation of coefficient of performance (COP) and energy efficiency ratio (EER); plotting Moiré plots and performing thermodynamic analysis.

All major components are mounted on the front panel for direct observation and operation.

The refrigerant is R134a or an equivalent environmentally friendly refrigerant.

3. Mechanical Structure:

Training Platform Structure: Constructed with heavy-duty aluminum profiles and sheet metal.

Minimum dimensions: Approximately 1600 (W) × 700 (D) × 1850 (H) mm.

Equipped with four casters: two with brakes; two without brakes.

Complete internal piping and wiring.

Copper pipes are treated for oxidation and corrosion resistance.

All major refrigeration components are mounted on the front panel, including: compressor; condenser (with fan); evaporator (with fan); expansion device; liquid receiver and accumulator; four-way reversing valve; solenoid valve; pressure gauge; manual valve; sight glass.

The refrigeration piping is clearly laid out for easy observation.

4. Electrical Requirements:

Power Supply: Single-phase 220V ±10%, 50Hz

Rated Current: 10A (minimum)

Residual Current Circuit Breaker: 16A (minimum)

Key Switch (Self-locking)

Emergency Stop Button (Self-locking)

Overload Protector: 10A (minimum)

Analog Voltmeter (0–250V)

Analog Ammeter (0–10A)

Indicator Lights (at least 5)

5. Refrigeration and Heat Pump Components:

The system include at least:

Compressor: Capacity: 1/2 hp (minimum); Voltage: 220V AC, 50Hz; Refrigerant: R134a or equivalent

Condenser (with fan): Single-phase 220V ±10%; Installation location for easy full observation

Evaporator (with fan): Single-phase 220V ±10%

Four-way reversing valve: 220VAC electronic; Minimum operating pressure: 2.5 MPa; Minimum operating pressure: 0.25 MPa; Discharge pipe: 3/8" (minimum); Suction/coil: 5/16" (minimum)

Expansion unit: Pressure expansion valve (R134a or equivalent refrigerant); Thermostatic expansion valve (TEV): Operating temperature range: -40°C to +10°C; Ambient temperature: -40°C to +90°C

Receiver tank: Capacity: 1 liter

Solenoid valves: Quantity: 9 1. Voltage: 220V ±10%; Welded connection, Φ6 mm (minimum)

Heat pump filter/dryer: DN 50; Interface: Minimum 1/4" (2 pieces)

Pressure controller: High pressure switch: 110–430 psi; Low pressure switch: 0–80 psi

Sight glasses: Welded (6 pieces)

6. Human-Machine Interface (HMI):

The system includes a programmable touchscreen HMI with the following minimum specifications: Touchscreen operation; Memory: SRAM 128 KB; Compressor start/stop control; Refrigeration and heat pump cycle switching; Expansion valve and solenoid valve path selection; System cycle diagram display; Real-time high/low pressure numerical display; Selectable pressure units (bar, psi, kPa)

The HMI provides an intuitive graphical display of system operation.

7. Instrumentation and Measurement:

The system includes:

Low pressure gauge (-30 ~ 260 psi / -0.1 ~ 1.8 MPa)

High pressure gauge (-30 ~ 550 psi / -0.1 ~ 3.8 MPa)

Temperature controller with sensor

Digital thermometer

Digital anemometer: Wind speed: 0.3 ~ 45 m/s; Resolution: 0.001 m/s; Air temperature: 0.0 ~ 45°C; Accuracy: ±2°C All measuring instruments are permanently installed and clearly labeled.

8. RFID Power Management System (Mandatory):

This system includes an RFID-based power management system:

Operating Frequency: 13.56 MHz high frequency

Communication Interface: RS485 or standard

LED display shows RFID card information and error codes

Display can be customized via software

Audio status prompts

LED indicator lights

Data verification: OLED comparison method; command-based verification

Software: Compliant with ISO-15693; supports ModBus_TCP and ModBus_RTU

The RFID system achieves secure power activation through card authentication.

9. Standard Accessories:

Includes the following accessories:

Dual composite pressure gauge set (R404A, R407C, R134a, R22)

Digital thermometer

Digital anemometer

Tool kit includes: 2L oxygen cylinder; fuel cylinder; welding torch; toolbox

Vacuum pump (1L)

R134a refrigerant or equivalent (1 can)

Experiment manual (1 copy)

10. Functional Capabilities:

The system supports the following training activities:

Operation of the refrigeration cycle system; Debugging of the refrigeration cycle system; Performance analysis of the refrigeration system; Operation of the reverse cycle heat pump system; Performance analysis of the heat pump system; Morrillch plotting; COP and EER calculation; Comparison of cooling and heating energy consumption; Comparison of system performance under different operating modes.