论文部分内容阅读
介绍了低品位热能远距离输送的重要性,及其原理、模拟计算以及实验结果.以减小输送功耗和多功能应用为目标,通过分析和比较发现单级氨水吸收循环是最合适的选择.计算结果显示,热源端有120℃饱和水蒸汽余热可供利用,输送距离为50km,用户端夏季得到10℃的冷量输出时,其热力效率可达0.5;冬季得到55℃的热量输出时,其热力效率可达到0.6;制冷和制热的远距离输送电力效率均可达到50以上.通过建立小型化的实验样机,实验结果表明,夏季冷却水进口温度为30℃,冷媒水出口温度为7℃时,其制冷热效率为0.432;过渡季节冷却水进口温度为22℃,热媒水出口温度为55℃时,其制热热效率为0.535,基本验证了基于氨水吸收技术的低品位热能远距离输送系统的可行性.研究表明使用氨水吸收系统可以有效地利用远距离余热用于城市集中供冷或供热.
The importance of long-distance transport of low-grade thermal energy, its principle, simulation calculation and experimental results are introduced.With the goal of reducing power consumption and multi-functional applications, single-stage ammonia absorption cycle is the most suitable choice through analysis and comparison The calculation results show that the heat source has a residual heat of 120 ℃ saturated steam can be used, the transmission distance of 50km, the user side of the summer to be 10 ℃ cold output, the thermal efficiency of up to 0.5; winter 55 ℃ when the heat output , Its thermal efficiency can reach 0.6; cooling and heating long-distance power transmission efficiency can reach above 50. Through the establishment of small prototype, the experimental results show that the inlet temperature of the cooling water in summer is 30 ℃, the outlet temperature of the refrigerant water is 7 ℃, the cooling and heating efficiency is 0.432, the cooling water inlet temperature is 22 ℃ and the outlet temperature of heating medium is 55 ℃, the heating efficiency is 0.535 in the transitional season, and the low-grade thermal energy based on ammonia absorption technology is basically verified. Feasibility of conveying system.Research shows that the use of ammonia absorption system can effectively use long-distance waste heat for urban central cooling or heating.