❄ Refrigeration Comparison Test Bench

• Conventional education in HVAC often focuses only on vapour compression systems.
• Absorption and thermoelectric cooling methods are rarely demonstrated due to equipment limitations and cost.
• Lack of unified platforms for comparing efficiency, behavior, and performance under consistent test scenarios.

A multifunctional Refrigeration Comparison Test Bench combining vapour compression, absorption, and thermoelectric cooling systems. Enables side-by-side operation and analysis under identical conditions — ideal for both education and research.

• Three integrated refrigeration systems:
• Vapour Compression: Compressor, condenser, expansion valve, evaporator.
• Absorption: Generator, absorber, condenser, evaporator — heat-driven.
• Thermoelectric (Peltier): Semiconductor module with heat sink and DC input.
• Temperature and pressure monitoring across all subsystems.
• Digital meters or interfaces for real-time cooling performance tracking.
• Shared insulated chamber to evaluate under uniform heat load.
• Independent switching control to activate each subsystem separately.

• Enables comparison of Coefficient of Performance (COP), energy usage, and time-to-cool among technologies.
• Introduces non-traditional methods like thermoelectric and absorption for off-grid or silent operation.
• Supports lab experiments on energy efficiency, thermal behavior, and system dynamics.
• Encourages innovation and hybridization in refrigeration technology research.

• Measuring COP for each system under consistent ambient and load settings.
• Observing transient vs. steady-state behavior of various refrigeration types.
• Exploring compatibility of absorption cooling with solar thermal or waste heat input.