Part of the measurement campaign was to evaluate the performance of two types of heat exchangers under the same operating conditions, and to compare them with respect to technical and also economic aspects. For charging different charging temperatures form -12°C up to -2°C were chosen and measured. Discharging temperature ranged from 20°C to 24°C.

System A is a heat exchanger manufactured from copper with a heat transfer area of 5.5 m2. System B is manufactured from polypropylene, its heat transfer area is about 4 m2.

A test rig was built which is shown in Figure 3 including all measuring points and all measured variables.

In the following several experimental runs will be described and a short overview of measured results will be given.