1. Description
With the air-to-water heat pump ST 102 the ambient heat of the air is used to heat water.
The heat pump circuit consists of a compressor, an evaporator with fan, a thermostatic expansion valve and a coaxial coil heat exchanger as condenser. All components are clearly arranged in the trainer.
The compressed refrigerant vapour condenses in the outer pipe of the condenser and thereby discharges heat to the water in the inner pipe. The liquid refrigerant evaporates at low pressure in the finned tube evaporator and thereby absorbs heat from the ambient air.
The hot water circuit consists of a tank, a pump and the condenser as heater. For a continuous operation the generated heat is dissipated via an external cooling water connection. The cooling water flow rate is set via a valve and measured.
2. Technical details
Specification
investigation of a heat pump with a water circuit as load
refrigeration circuit with compressor, evaporator with fan, thermostatic expansion valve and coaxial coil heat exchanger as condenser
hot water circuit with pump, tank and condenser as heater
additional cooling via pipe coil in the hot water tank and external cooling water
record and display of all relevant measured values
Technical data
Compressor
refrigeration capacity: 372W at 7,2/55°C
power consumption: 205W at at 7,2/55°C
Coaxial coil heat exchanger (condenser)
refrigerant content: 0,55L
water content: 0,3L
Finned tube evaporator
transfer area: approx. 0,175m2
Pump
max. flow rate: 1,9m3/h
max. head: 1,4m
Hot water tank volume: approx. 4,5L
Refrigerant: R513A
GWP: 631
filling volume: 1kg
CO2-equivalent: 0,6t
Measuring ranges
pressure: 2x -1…15bar
temperature: 4x 0…100°C, 2x -100…100°C
power: 0…6000W
flow rate: 0…108L/h (water)
flow rate: 10…160L/h (cooling water)
flow rate: 0…17kg/h (refrigerant)
230V, 50Hz, 1 phase; 230V, 60Hz, 1 phase
120V, 60Hz, 1 phase
UL/CSA optional
Required for operation
water connection, drain, PC with Windows recommended
