中国石油大港石化公司的原低温热系统未能充分有效利用,生产装置大量优质低温热源被浪费,节能潜力以待挖掘。通过三期工程,充分利用多个生产装置的优质低温热源,建立了南北区生产低温热系统,并完善生活采暖低温热系统,用于生产装置和罐...中国石油大港石化公司的原低温热系统未能充分有效利用,生产装置大量优质低温热源被浪费,节能潜力以待挖掘。通过三期工程,充分利用多个生产装置的优质低温热源,建立了南北区生产低温热系统,并完善生活采暖低温热系统,用于生产装置和罐区冬季伴热和全厂生活采暖;这不仅降低了生产装置热源冷却成本及装置、罐区冬季伴热的蒸汽消耗,同时也保障了液化气罐区伴热的安全生产。改造后全厂低温热利用得到全面优化,节能效果十分显著,全厂综合能耗分别减少20 444.18 k W和22 151.44 k W,经济效益巨大。展开更多
The present paper introduces the concepts of exergy and treats it applications to analysis of the gain in exergy efficiency between one-step and multi-step thermal processes. The analysis, which is carried out with th...The present paper introduces the concepts of exergy and treats it applications to analysis of the gain in exergy efficiency between one-step and multi-step thermal processes. The analysis, which is carried out with the Excel-based SEPE program, is exemplified with the comparison between single-step and two-steps heat pump setup for providing heat to a floor heating system and for domestic hot water. The paper discusses the use of the concept of exergy efficiency as a measure of success for design of a heat pump application and how the use of information on exergy destruction and temperature levels in different parts of the system add a new perspective to the analysis and the evaluation of the system performance. The paper shows how this information can be used to improve the system configuration and also the operation of the system for given boundary conditions. This is especially useful when the energy from the low temperature sources can be utilized at different temperature or quality levels such as for space heating and domestic hot water.展开更多
文摘中国石油大港石化公司的原低温热系统未能充分有效利用,生产装置大量优质低温热源被浪费,节能潜力以待挖掘。通过三期工程,充分利用多个生产装置的优质低温热源,建立了南北区生产低温热系统,并完善生活采暖低温热系统,用于生产装置和罐区冬季伴热和全厂生活采暖;这不仅降低了生产装置热源冷却成本及装置、罐区冬季伴热的蒸汽消耗,同时也保障了液化气罐区伴热的安全生产。改造后全厂低温热利用得到全面优化,节能效果十分显著,全厂综合能耗分别减少20 444.18 k W和22 151.44 k W,经济效益巨大。
文摘The present paper introduces the concepts of exergy and treats it applications to analysis of the gain in exergy efficiency between one-step and multi-step thermal processes. The analysis, which is carried out with the Excel-based SEPE program, is exemplified with the comparison between single-step and two-steps heat pump setup for providing heat to a floor heating system and for domestic hot water. The paper discusses the use of the concept of exergy efficiency as a measure of success for design of a heat pump application and how the use of information on exergy destruction and temperature levels in different parts of the system add a new perspective to the analysis and the evaluation of the system performance. The paper shows how this information can be used to improve the system configuration and also the operation of the system for given boundary conditions. This is especially useful when the energy from the low temperature sources can be utilized at different temperature or quality levels such as for space heating and domestic hot water.
