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首页> 外文期刊>Journal of Energy Resources Technology >Thermodynamic and Economic Analysis of the Production of Electricity, Heat, and Cold in the Combined Heat and Power Unit With the Absorption Chillers
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Thermodynamic and Economic Analysis of the Production of Electricity, Heat, and Cold in the Combined Heat and Power Unit With the Absorption Chillers

机译：带吸收式制冷机的热电联产机组中电，热和冷生产的热力学和经济分析

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This paper presents the approach of thermoeconomic analysis of centralized cold generation in trigeneration system integrated with steam-powered absorption chillers (ACs). The analysis was conducted for real back-pressure combined heat and power (CHP) unit BC-50 and single-effect absorption refrigerators using water and lithium bromide as the working fluids. It has been assumed that the heating medium supplied to the chiller generator is technological steam from the existing steam bleeding. The calculations take into account changes of energy demand for heating and cooling for each month of the year. Mathematical simulation models of cogeneration and trigeneration systems have been developed with the commercial program for power plant simulation EBSILON PROFESSIONAL. System effects of heat and electricity cogeneration and cogeneration with additional cold production have been calculated compared to separate production of heat, electricity, and cold (replaced heating plant and power unit). The effect of trigeneration has been assessed quantitatively by the coefficient of the increasing cogeneration effects, which has been calculated as a ratio of chemical energy savings of fuels to the demand for heat by the consumers in the cases of trigeneration and cogeneration. This paper includes also analysis of economic effectiveness of a trigeneration system with ACs for cold agent production. The results of economic calculations show that an acceptable payback period of approximately 13 yr for a CHP and absorption system may be achieved. Discounted payback (DPB) is equal to the half of assumed operating time of the system. Sensitivity analysis shows that the most important impact on profitability is the selling price of cold and the purchase of fuel-hard coal.
机译：本文介绍了集成了蒸汽动力吸收式冷水机（AC）的三联发电系统中集中式冷热的热经济学分析方法。使用水和溴化锂作为工作流体，对真实的背压式热电联产（BCP）单元BC-50和单效吸收式制冷机进行了分析。假定供应给冷却器发生器的加热介质是来自现有蒸汽渗出的技术蒸汽。该计算考虑了一年中每个月供暖和制冷能源需求的变化。热电联产和三联产系统的数学仿真模型已通过商业程序开发，用于电厂仿真EBSILON PROFESSIONAL。与单独生产热，电和冷（替代供热厂和动力装置）相比，已经计算了热电联产，热电联产以及额外的冷产量对系统的影响。通过增加的热电联产效应的系数来定量地评估了三热电联产的效果，该系数被计算为燃料的化学节能量与三热电联产和热电联产的情况下消费者的热量需求之比。本文还分析了带有AC的三代发电系统用于冷剂生产的经济效益。经济计算结果表明，对于CHP和吸收系统，可以实现大约13年的可接受的投资回收期。折扣投资回报（DPB）等于系统假定运行时间的一半。敏感性分析显示，对利润率的最重要影响是冷的售价和燃料性煤的购买。

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