Abstract
This article discusses the problems related with the cold production, i.e. energy efficiency of the process. The idea of solar cooling systems has been presented as the solution of the problem of big electricity demand. The paper discusses the principle of the operation of absorption chillers. Disadvantages and advantages of the solar cooling systems were discussed. The installation for manufacturing high-temperature heat based on solar collectors and concentrator of solar radiation constructed in AGH in Cracow has been presented. This installation is a first stage of projected, complete solar cooling system. The special attention is paid to the dedicated solar high-temperature heat receiver as a most important element of the system. The achieved values of temperature, power and efficiency depending on the working medium flow has been presented and discussed. The intensity of solar radiation during the measurements has been taken into account. Two versions of heat receiver were investigated: non-insulated and insulated with mineral wool. The obtained efficiency of the heat receiver (less than 30%) is not satisfactory but possibility of improvements exist.
Highlights
In the developed countries, the clear increase in energy demand for refrigeration and air conditioning has been observed for many years
The special attention is paid to the dedicated solar high-temperature heat receiver as a most important element of the system
The clear increase in energy demand for refrigeration and air conditioning has been observed for many years
Summary
The clear increase in energy demand for refrigeration and air conditioning has been observed for many years. In figure 1 can be seen that regardless of the geometry of the building the greater demand for energy needed to maintain thermal comfort occurs in the winter period. The biggest share in electricity production, in Europe and around the world, comes from carbon power plants They are characterised by high inertia, energy safety during summer is at risk. Difficult to predict weather conditions are sometimes rapid within days, and sometimes even hours This means that during the period of strong heat, users suddenly overload the power grid. The presented coherence is the basis for research on modern cooling systems based on solar energy It is possible by applying the sorption refrigerator, i.e., a heat-powered device
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