Experimental heat pump/cooling device

The experimental heat pump/cooling device enables:

heat and cold generation
comparison of device performance with water- and air-evaporator
refrigerant mass flow, pressure and temperature measurements
ability to set a large number of operating parameters

Water evaporator of an experimental heat pump/cooling device

The Experimental Heat Pump is a custom-made device with the following components: an air evaporator, a water evaporator, a water condenser, a twin rotary compressor and an expansion valve. Refrigerant mass flow measurements are performed by a Coriolis mass flow meter. The system also allows for the pressure and temperature measurements in all the significant points of a cooling cycle. Besides, compressor electrical power is also measured. All variables can be monitored in real time in the LabVIEW software environment, which also enables the storage and possible further use of the measured data. A special feature of the system is its modular design, which makes it easier to replace all the main components of the system. Currently, two types of evaporators (air and water) are already installed in the system. This allows for the determination of the energy efficient use of energy for heat or cold production.

Contakt

FAQ

Specifications

Power
Compressor
Evaporator
Condenser
Expansion valve
Sensors

Refrigerant mass flow measurement: Endress+Houser Proline Cubemass C 100 Coriolis flowmeter

Mass flow accuracy measurement (gas phase): ±0.5% measured value

Temperature measurements: thermocouple type K

Measurement uncertainty of temperature measurements: 0.5 K.

Pressure transmitters: Danfoss AKS 33 60G2045/49

Pressure accuracy measurements: ±0.3% of measured range

Frequently Asked Question

Our company would like to cooperate with you. What is the procedure?

Please contact us first using the form below and we will arrange an introduction meeting. During the introduction meeting we will discuss your requirements and wishes and present our system in more detail. On this basis we will prepare an offer for you. The measurements will start when all necessary components and the refrigerant are delivered. After the measurements, we will arrange another meeting to review the results and agree on additional analyzes. At the end you will receive the results in the form of a report.
Is it possible to change the type of refrigerant in your system?

It is possible to change the refrigerant in the system to a certain extent, as we have to ensure compatibility with the compressor’s lubricating oils. In principle, the system is suitable for the use of different refrigerants and different charges, with certain restrictions. The system currently has an R32 refrigerant. For further information, please contact us using the form below.
We are a company that manufactures heat exchangers. Does your system allow the comparative analysis of two different evaporators?
Does your system allow the validation of a numerical model developed in our company?
What is the cost of testing a heat exchanger in your system?
Is it possible to monitor the parameters in the system in real time?
In our company we manufacture fans for dynamic condensers. How long would it take to perform a comparative analysis of three different fans?

The total duration of the measurements depends on several factors, such as the supply of the components, the type of refrigerant, the setting of the test bench, the adaptation of the data output, etc. The duration of a measurement depends on your requirements or specific tests: it may take a few minutes or a few days. In the case of three fans, the measurements are performed separately for each fan. For further information, please contact us using the form below.

Questions?

Do not hesitate to contact us via e-mail or by telephone. You can also visit us at the Faculty of Mechanical Engineering in Ljubljana

003861-4771-418

lahde@fs.uni-lj.si

Aškerceva ul. 6
1000 Ljubljana
Slovenia