doi: 10.3850/978-981-08-7614-2_IMPRES063

ABSTRACT

During the last few years, various new sorption chillers (heat pumps) with small-scale cooling capacity have been developed worldwide. Many of these absorption and adsorption chillers have now passed over from prototype into small serial production and consequently a rising number of products are expected to enter the market in the coming years. In general, thermal cooling by solar energy, district heat or waste heat from Combined Heat and Power (CHP) units, biomass as well as processes could be lead to a considerable reduction of energy consumption. The sorption chillers use environmentally friendly refrigerants (water or ammonia) and have only very low electricity demand. Therefore the operating costs of these chillers are very low and the CO₂ balance compared to split-units is considerably better. In the cooling capacity range up to 30 kW several water/lithium bromide, water/lithium chloride and ammonia/water absorption chillers as well as water/silica gel and water/zeolithe adsorption chillers are available. These chillers are analyzed to compare the specific weight, specific cooling power (SCP), power density, power consumption and electrical COP.

Keywords: Absorption, Adsorption, Sorption chillers, Heat pumps, Performance.

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