Heat Pump
Categories: Engineering Lab EquipmentWith the air-to-water heat pump 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 coa...
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Description
With the air-to-water heat pump 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.
Learning Objectives/Experiments
Design and operation of an air-to-water heat pump
Representation of the thermodynamic cycle in the log p-h
diagram
Energy balances
Determination of important characteristic variables
Compressor pressure ratio
Ideal coefficient of performance
Real coefficient of performance
Dependence of the real coefficient of performance on the
temperature difference (air-to-water)
Operating behaviour under load
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)
230V, 50Hz, 1 phase; 230V, 60Hz, 1 phase
120V, 60Hz, 1 phase
quick overview :
With the air-to-water heat pump 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.
Learning Objectives/Experiments
Design and operation of an air-to-water heat pump
Representation of the thermodynamic cycle in the log p-h
diagram
Energy balances
Determination of important characteristic variables
Compressor pressure ratio
Ideal coefficient of performance
Real coefficient of performance
Dependence of the real coefficient of performance on the
temperature difference (air-to-water)
Operating behaviour under load
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)
230V, 50Hz, 1 phase; 230V, 60Hz, 1 phase
120V, 60Hz, 1 phase
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