Refrigeration Cycle and Heat Pump Training System

The Atto Labware India Refrigeration Cycle and Heat Pump training system with HMI is a premium, programmable technical education platform engineered for advanced vocational training and comprehensive laboratory performance analysis. Functioning as both a forward refrigeration setup and a reverse-cycle heat pump, this factory-assembled turnkey unit empowers engineering students to analyze circuit component actions, complete structural thermodynamic assessments, plot active Mollier diagrams, and determine system COP and EER values.

Brand: atto labware

Model: RCHP-HMI

1. Mechanical Construction & Bench

• • Framework Layout: Heavy-duty, robust industrial aluminum profile framework and structural sheet-metal construction providing long-term durability.

  • Approximate Dimensions: Minimum parameters: 1600 (W) × 750 (D) × 1900 (H) mm.

  • Mobility Base: Mounted on four (4) industrial casters for rapid laboratory reconfiguration: Two (2) casters equipped with integrated locking toggle brakes, and two (2) casters without brakes.

  • Front Demonstration Panel:

    • All main components mounted visibly on the front panel face for direct, clear observation of system states.

    • High-grade copper refrigeration piping pathways layout cleanly arranged and coated with anti-oxidation and anti-corrosion protective treatment barriers.

    • Fully piped and electrically pre-wired from the factory, delivered ready for immediate instructional deployment.

2. Core Refrigeration & Heat Pump Circuit Components

• • Hermetic Compressor: Industrial educational grade; Capacity parameter: 1/2 HP (Minimum); Operating Voltage: 220V AC, 50Hz. Compatible with eco-friendly R134a or equivalent environmentally acceptable refrigerants.

  • Condenser Assembly: High-visibility surface finned condenser coil unit equipped with a dedicated forced-draft single-phase 220V ±10% electrical cooling fan.

  • Evaporator Assembly: High-visibility surface finned evaporator coil unit equipped with a standalone single-phase 220V ±10% structural circulating air fan.

  • Four-Way Reversing Valve: Electronic 220VAC type valve enabling seamless configuration swaps between cooling and heating modes. Maximum operating pressure rating: 2.5 MPa; Minimum operating pressure threshold: 0.25 MPa. Core connection lines feature size limits of 3/8″ Minimum for discharge and 5/16″ Minimum for suction/coil paths.

  • Expansion Throttling Devices: Dual flow path regulation methods: Fully adjustable manual pressure expansion configuration valve alongside an automatic Thermostatic Expansion Valve (TEV) rated for an evaporator operating range of -40°C to +10°C under surrounding ambient levels up to +90°C.

  • Solenoid Valves: Quantity Approx : 9 pcs. High-precision flow circuit redirection loop control valves; Operating voltage: 220V ±10%; Built with robust welded pipeline junctions featuring a minimum Φ6 mm diameter.

  • Fluid Management Nodes:

    • Liquid Receiver: Heavy-gauge container featuring a 1-Liter storage volumetric capacity.

    • Suction Accumulator: Heavy-duty inline refrigerant gas/liquid phase separating surge vessel.

    • Heat Pump Filter-Driers: DN 50 sized block filters equipped with dual minimum 1/4″ service flare port nodes.

    • Sight Glasses: Quantity Approx: 6 pcs. Robust, industrial welded-type sight glasses installed at critical transition sectors for clear phase monitoring.

    • Integrated system includes structural manual isolation circuit hand valves.

3. Electrical Requirements & Safety Control Parameters

• • Mains Power Supply Input: Single-phase 220V ±10%, 50Hz frequency layout.

  • System Rated Current: 10A (Minimum) baseline threshold.

  • Earth Leakage Protection: Integrated Earth Leakage Circuit Breaker (ELCB) rated at 16A (Minimum).

  • Overload Safety System: Dedicated system thermal overload circuit protector rated at 10A (Minimum).

  • Primary System Master Locks:

    • Self-locking industrial Key Switch ensuring authorized instructor access and security.

    • Self-locking, high-visibility mushroom head Emergency Stop push-button.

  • Analog Panel Meters: Console-embedded dial meters tracking line Voltmeter voltage (0–250V) and system pointer Ammeter consumption (0–10A).

  • Status Signal Elements: 3 Industrial panel-mounted color LED status indicator lamps.

4. Programmable Human-Machine Interface (HMI) Console

The core training platform integrates a high-resolution programmable touchscreen HMI panel for smart graphical data reporting and system control mapping:

• Terminal Screen Hardware: Industrial multi-touch capacitive screen paired with an embedded high-speed 128 KB SRAM data logging memory stack.

• Direct Digital Actuation Matrix: Real-time soft-touch control overrides including compressor start/stop stages, forward refrigeration/reverse heat pump cycle mode switching, and expansion valve path routing adjustments.

• Dynamic Graphical Mapping: Real-time display panel charting live system cycle diagrams along with structural thermodynamic path tracking animations.

• Metrology Numerical Conversions: Continuous digital numerical readout tracking high and low cycle operating pressure states with instant units conversion across bar, psi, and kPa groups.

5. Instrumentation & Process Metrology Standards

All measuring instruments are permanently secured to the console board surface and clearly labeled:

• Low-Pressure Dial Gauge: Heavy-duty panel gauge, scaling from -30 to 260 psi / -0.1 to 1.8 MPa.

• High-Pressure Dial Gauge: Heavy-duty panel gauge, scaling from -30 to 550 psi / -0.1 to 3.8 MPa.

• Thermal Management Arrays: Digital process thermometer instrumentation module coupled alongside an independent process Temperature Controller probe sensor.

• Multi-Function Digital Anemometer:

  • Wind Speed Velocity Span: 0.3 to 45 m/s.

  • Resolution Parameter Step: 0.001 m/s.

  • Air Temperature Scope Tracking: 0.0°C to 45°C environment metrics.

  • Metrology Precision Variance: Reliable accuracy tracking matching ±2°C thresholds.

6. RFID Power Management System

To support advanced vocational laboratory resource tracking, student time logs, and secure authentication, the bench features an integrated RFID control card manager:

• Technical Specification:
  • RFID Frequency 125khz / 13.56 MHz
  • RFID reader max Current < 120mA
  • RFID Scan time < 0.5 sec
  • Communication serial UART 9600 bps.
  • Detecting Range up to 0-10cm for 125KHz / 0-5 cm for 13.56 MHz
  • Communication USB ,RS232 ,RS485 , Ethernet 10/100 Mbps ,Wi-Fi / GPRS
  • HEX Keypad with LCD for display system
  • 8 GB storage for LOG
  • Built-in RTC for stamped data logging
  • Real Time Location: GNSS GPS Receiver
  • Buzzer on authentication
  • Supported Protocol: TCP-IP, MODBUS RTU /TCP , FTP, RESTFULL, JSON & SSL MQTT ,
  • Security: WFA, WPA/WPA2 and WAPI
  • Optional relay 4 amps – Magnetic Lock control
  • Power supply: DC 12v-24v 2Amps
  • Protection circuit for surge and EMC Compliance
  • Enclosure: IP65
  • Dimension (LxWxH): 120X140X100MM

7. Scope of Supply (Turnkey Deliverables)

The contractor shall supply, deliver, install, test, commission, and hand over a complete operational learning workstation package containing:

• Item 01: The Refrigeration and Heat Pump Training System Bench: Main heavy aluminum structural frame enclosing the pre-wired, pre-piped R134a multi-expansion loop with integrated HMI screen and diagnostic instrumentation panel.

• Item 02: Dual Compound Pressure Gauge Set: Service-ready manifold tracking gas loops including R404A, R407C, R134a, and R22 lines.

• Item 03: Handheld Test Metrology Tools: Supplementary portable Digital Thermometer device and matching handheld portable Digital Anemometer tool.

• Item 04: Heavy-Duty Mobile Brazing Kit: Industrial field maintenance toolbox packing a 2L Oxygen tank cylinder, pressurized commercial fuel gas cylinder, and a matching welding torch handle with tips.

• Item 05: Vacuum Dehydration Service Assembly: Single-stage direct-drive High Vacuum Service Pump featuring a 1-Liter volumetric oil reservoir case block.

• Item 06: Refrigerant Supply Canister: One (1) pressurized cylinder container supply of pure, eco-friendly R134a compound.

• Item 07: Complete Technical Documentation Suite: Comprehensive printed hardcover and softcopy digital files containing detailed user manuals, student training experiment work logs, clear electrical schematics, touchscreen HMI operational guides, refrigerant piping flow blueprints, system maintenance steps, and line-item spare parts catalogs translated in English.

8. Target Laboratory Learning Capabilities

This educational training platform supports the following academic syllabus and practical workshop exercises:

• Practical laboratory training in reading, mapping, and executing industrial electrical circuit and refrigeration system schematics.

• Safe execution of fundamental refrigeration tasks: line evacuation, nitrogen leak checks, vacuum dehydration, charging, and system commissioning.

• Plotting physical thermodynamic parameters directly onto pressure-enthalpy (P–h) charts and tracking real-time Mollier diagram transformations.

• Quantitative calculation metrics verifying the Coefficient of Performance (COP) and Energy Efficiency Ratio (EER) for both forward cooling and heating reverse-cycle operations.

• Determining exact refrigerant superheat values at the compressor suction node and liquid subcooling bounds at the condenser outlet line.

• Continuous diagnostic verification of active components, tracking performance metrics under variable heat source or sink temperature conditions.

• Comparative study compiling overall energy consumption data differentials between matching refrigeration and heating states under diverse operating valve configurations.