supermarket refrigerated showcase » article > walk-in display coolers > display cooler Ammonia absorption chiller and vapor compression chiller performance comparison
display cooler Ammonia absorption chiller and vapor compression chiller performance comparison
author: supermarket refrigerated showcase category: walk-in display coolers Views: 560Time: 2016-08-22
display cooler Ammonia absorption chiller and vapor compression chiller performance comparison
display cooler Ammonia absorption chiller and vapor compression chiller performance comparison The coefficient of performance of the absorption refrigeration cycle and the coefficient of performance of the vapor compression refrigeration cycle are both the main technical indicators used to evaluate the cycle economy, but they cannot be directly compared, because the compression refrigerator consumes power, and the absorption refrigerator Consuming heat energy, work has a higher grade than heat energy, and the cost of generating work is also high. When comparing these two values, the heat exchange and efficiency of the steam power plant in the power station must be considered. Even so, the coefficient of performance of the absorption chiller is still lower than that of the compression type, because there are more irreversible losses in the operation of the absorption chiller system. From the comparison of the operating costs of the two systems, it seems that an absorption refrigeration system is more suitable at a lower evaporating temperature, especially when there is a high-temperature heating medium available. Because it is possible to use a single-stage absorption refrigeration system to obtain the low temperature that can only be obtained with a two-stage compression system.
display cooler Features of ammonia absorption chiller Compared with other types of chillers, ammonia absorption chiller has the following features:
①Using steam or hot water as a heat source, which is conducive to the comprehensive utilization of waste heat, especially suitable for chemical industry and metallurgy And refrigeration equipment in light industry;
② uses ammonia as the refrigerant, which can produce low temperature below 0℃;
③ the whole device is heat exchange equipment such as towers and tanks except for pumps, with simple structure and easy processing and manufacturing;
④vibration and noise It is small and can be installed in the open air, thereby reducing construction costs; when the load of
⑤ is adjusted within the range of 30%-10o%, the economy of the device does not change significantly;
⑥ is simple to maintain, easy to operate, and easy to manage;
⑦ ammonia is inexpensive and has sufficient sources ;
⑧ has no damaging effect on the atmospheric ozone layer;
⑨ corrosive to copper and copper alloys (except phosphor bronze);
⑩ steel and cooling water consumption is large; the coefficient of performance is low; because the boiling points of ammonia and water are relatively close, in order to improve ammonia The system must be equipped with distillation and fractional condensation equipment.
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