【作者】 王刚； 卢玫； 杨茉； 余敏； 李凌；

【Author】 WANG Gang LU Mei YANG Mo YU Min LI Ling (University of Shanghai for Science and Technology, Thermal Engineering Institute, Shanghai 20093)

【机构】 上海理工大学热工程研究所；

【摘要】 吸收式制冷机型和汽轮机组的匹配问题以及联产制冷的节能经济性等是热电冷联供中的重要问题。论文从汽轮机抽汽特性出发,以Aпг-12-1型和CB12-35/10/3型汽轮机组抽汽参数为例,对联供中汽轮机抽汽制冷的能效性能从三个方面进行了研究。结果表明,抽汽制冷所能利用的焓基本上都比抽汽发电高,且δe随着抽汽压力降低、汽轮机内效率ηi降低而升高;与抽汽发电相比,抽汽制冷经济效益是抽汽发电经济效益的两倍以上,δg不仅与抽汽压力、ηi有关,而且与溴化锂制冷机型式有关;对于抽汽压力分别为0.8MPa和0.12MPa的Aпг-12-1型汽轮机组,抽汽制冷的效益总是高于抽汽发电制冷。因此,在合理选择汽轮机抽汽参数与吸收式制冷机型式的前提下,联产抽汽制冷具有一定的经济效益。更多还原

【Abstract】 It is a key problem in combined cooling, heating and power production that the mode of LiBr refrigerator matchs steam turbine and whether extraction steam refrigerating has batter economic benefit than regenerating refrigeration of extraction steam. Begin with extraction steam characteristics of steam turbine, this paper made some study and analysis on the energy utility performance of extracting steam refrigerating in three aspects on the base of the extraction steam parameters of steam turbine Aпг-12-1 and CB12-35/10/3. The conclusion indicates that the enthalpy exergy made by extraction steam refrigerating primary is higher than extraction steam regenerating, and the exergy incrementδe increases with the reduction of the extraction steam pressure and steam turbine’s internal efficiency ηi. It is also found that the economy benefit of extraction steam refrigerating is twice better than that of extraction steam regeneration, andδg is not only related to extraction pressure andηi but also to refrigerating mode of LiBr refrigerator. When the extraction steam pressure is 0.8MPa or 0.12MPa, the extraction steam refrigerating benefit of the unit Aпг-12-1 is always better than regeneration refrigerating of extraction steam. Consequently, when both the parameters of extraction steam and the model of absorption refrigerator are properly selected, the economic benefit of extraction steam refrigerating of a combined cooling, heating and power system is better.更多还原