Thermal Analysis of Chillers

Abstract

Household refrigerators are part of our everyday life. As it is a system of continuous operation, the electrical efficiency is a major thing. The amount of energy used is determined by several factors together. Such as the efficiency of the cooling unit, the efficiency of the thermal insulation, the uniformity of the temperature in the refrigerator compartment, etc. The refrigerators are made in a very large number and the competition among the manufacturers is strong. For this reason, there is a need on the manufacturers' side to use as less material as possible and to make production technology as simple as possible. So, the target is to make the best possible devices at the lowest possible cost. Therefore, all elements of the equipment should be subjected to experimental and theoretical analysis. In this article, we will review two chillers: one is a freezer and the other is a refrigerator. For both devices, the thermal phenomena in the interior of the refrigerator and in the multi-layer wall of the machine are examined. We use an individually developed measuring system.
The measurement results are compared with preliminary results of numerical simulation. The modelling of the cooling units is not part of the article.