Purpose: Educational heat pump training system demonstrating heating and cooling cycles, 4-way valve
operation
Compressor: Not less than 1/2 HP,220 V /1 phase / 50 Hz, reciprocating.Refrigerant R-134a.R-22 and
anyotherHCFC.
Heat Exchanger1:Air-cooled.Thefan motor rating declared.
Heat Exchanger 2:A water vessel of not less than 10 litres fitted with a circulating pump and isolating
valves, permiting visual observation of the heat-exchange process by means of a transparent vessel, a
sight window.lmmersed-coil, coaxialandshell-and-tube constructions are all acceptable;
theconstruction and the heat-transfer areadeclared.
4-Way Valve: Reversing valve sized to the compressor duty, for heat pump mode switching.
Expansion Valves: Two expansion devices sized to the compressor duty.
Pressure Gauges: High pressure to 35 bar and low pressure to 15 bar; dial diameter not less than 63
mm; compatible with the refrigerant offered.
COP Display: Real-time coefficient of performance calculation and display. A software function is
acceptable.
Fault Simulation:Not less than 6 fault scenarios,implemented byswitch,valveor software,with fault
indication. Thescenarioslisted.
Control Panel: Moulded case circuit breaker 15 A; magnetic contactor; thermal overload relay; digital
watt meter;timers; push buttons; indicator lamps in red, green, yellow and white.
Data Board/Software:Measurement points shall cover,as a,compressor suction and
discharge, both heat exchanger inlets and outlets, expansion device inlet and outlet, and ambient. The
number,typeand location ofsensors declared.Interface: wirednetwork or USB interfaceto a
host PC.Software for Windows 10/11 with Mollier / pressure-enthalpy diagram and data logging.
.
