折合成本在空调冷热源优化决策中的应用

Application of reduced exergy in scheme-selection optimization of air-conditioning heating and cooling system

考虑了冷热源在不同运行工况时能源"质"的利用情况及制冷工况和制热工况的综合系数,提出了折合成本的概念,并分别采用折合冷量成本和折合热量成本作为评价指标,对3种方案进行分析比较,得到了相同的结果。研究表明,将折合成本作为评价冷热源系统方案优劣的指标,是较为科学合理的。

Because of the character of the heating and cooling systems which cooling in summer and heating in winter, two different exergy costs could be obtained respectively. Taking the example of optimizing process, the unit cooling exergy cost and unit heating exergy cost were adopted as evaluation index respectively, while, the results were different. The concept of reduced exergy cost was defined in this paper for the first time. Adopting the unit cooling reduced exergy cost and the unit heating reduced exergy cost as evaluation index respectively,the same result could be got. So,the reduced exergy cost can correctly reflect the consumption of energy ＂quality＂ for the whole system one year around, which is the key factor to evaluate air-conditioning heating and cooling system. Adopting it as evaluation index, the optimized result is reasonable and scientific.