外文翻譯---熱泵的應(yīng)用-文庫吧資料
2025-05-22 09:09本頁面
【正文】 The temperature of the heat source is 5176。C is typical for floor heating systems. Table 1 summarises typical temperature requirements for various heat and cold distribution systems. Table 1: Typical delivery temperatures for various heat and cold distribution systems. Application Supply temperature range (176。s low temperature radiators and convectors are designed for a maximum operating temperature of 4555176。C. Water distribution systems (hydronic systems) are predominantly used in Europe, Canada and the north eastern part of the United States. Conventional radiator systems require high distribution temperatures, typically 6090176。 o distillation。 o drying/dehumidification。 o water heating for washing, sanitation and cleaning。 (. repressed process vapour), although other process vapours are also used, notably in the (petro) chemical industry. o Closedcycle pression heat pumps are described in the section Heat pump technology . Currently applied working fluids limit the maximum output temperature to 120 篊 . o Absorption heat pumps (Type I) are not widely used in industrial applications. Some have been realised to recover heat from refuse incineration plants, notably in Sweden and Denmark. Current systems with water/lithium bromide as working pair achieve an output temperature of 100篊 and a temperature lift of 65 篊 . The COP typically ranges from to . The new generation of advanced absorption heat pump systems will have higher output temperatures (up to 260 篊 ) and higher temperature lifts. o Heat transformers (Type II) have the same main ponents and working principle as absorption heat pumps. With a heat transformer waste heat can be upgraded, virtually without the use of external drive energy. Waste heat of a medium temperature (. between the demand level and the environmental level) is supplied to the evaporator and generator. Useful heat of a higher temperature is given off in the absorber. All current systems use water and lithium bromide as working pair. These heat transformers can achieve a delivery temperatures up to 150 篊 , typically with a lift of 50 篊 . COPs under these conditions range from to . 第 3 頁 o Reverse Braytoncycle heat pumps recover solvents from gases in many processes. Solvent loaden air is pressed, and then expanded. The air cools through the expansion, and the solvents condense and are recovered. Further expansion (with the associated additional cooling, condensation and solvent recovery) takes place in a turbine, which drives the pressor. 2). Applications Industrial heat pumps are mainly used for: o space heating。 第 1 頁 外文翻譯 The Applications of Heat pumps pumps in industry 1). Systems Relatively few heat pumps are currently installed in industry. However, as environmental regulations bee stricter, industrial heat pumps can bee an important technology to reduce emissions, improve efficiency, and limit the use of ground water for cooling To ensure the sound application of heat pumps in industry, processes should be optimised and integrated. Through process integration improved energy efficiency is achieved by thermodynamically optimising total industrial
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