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利用成本方程,建立了制冷机经济性分析的模型,并结合北京地区旅馆类建筑空调系统的实例,分析比较了蒸气压缩离心式、双效溴化锂吸收式、直燃溴化锂吸收式三种不同制冷机的经济性。分析结果表明,从有效能的利用和经济性角度考虑,虽然溴化锂吸收式制冷机不省能,但经济性较好。其中存在价格因素,在现行价格体系下,单位燃料动力的成本,煤炭是电力的1／10。这也说明当前我国的能源价格不合理,特别是电力价格相对于煤炭价格过高。
By using the cost equation, the model of economic analysis of chiller is established. Based on the example of hotel-type building air-conditioning system in Beijing, three different absorption modes of vapor compression centrifugal and double-effect lithium bromide absorption and direct combustion lithium bromide absorption are analyzed. Refrigerator economy. The results show that, from the point of view of effective utilization and economy, although lithium bromide absorption chiller is not energy-saving, its economy is better. Among them, there are price factors. Under the current price system, the unit cost of fuel power and coal is 1/10 of that of electricity. This also shows that at present our country's energy prices are unreasonable, especially the price of electricity relative to coal is too high.