论文部分内容阅读
提出了一种新型串级连接,即将有机朗肯循环(ORC)与氯化钙/氯化钡两级吸附式制冷机组串联起来。ORC系统工质选为R245fa,假设等熵效率与功电转化效率乘积为0.4,当膨胀机进口压力从0.6 MPa变化到1.1 MPa,能量效率、效率、发电量变化范围分别是3.9%~5.5%、34%~31.5%、392~600 W,如果增加回热器后,能量效率从4.2%变化到6.0%;利用压缩空气模拟工质R245fa推动膨胀机,当进口压力为1 MPa时,膨胀机的等熵效率与功电转化效率乘积是0.53,发电量为300 W;两级吸附式制冷系统,当热源温度从75℃变化到95℃,制冷量、能量效率及媚效率变化范围分别是1.42~2.2 kW、13.4%~16.8%、18.1%~16.6%;有机朗肯循环与两级吸附制冷串连起来,热源温度为98℃时,系统总的能量效率为11.8%,媚效率为23.7%,发电量为560 W,制冷量是2.2 kW.
A new type of cascade connection is proposed, in which organic Rankine cycle (ORC) is connected in series with a calcium chloride / barium chloride two-stage adsorption chiller. ORC system working fluid is selected as R245fa. Assuming that the product of isentropic efficiency and power conversion efficiency is 0.4, when the inlet pressure of expander changes from 0.6 MPa to 1.1 MPa, the range of energy efficiency, efficiency and power generation is 3.9% -5.5 %, 34% -31.5% and 392-600 W, respectively. The energy efficiency changes from 4.2% to 6.0% with the addition of a regenerator. The expander is driven by the compressed air refrigerant R245fa to expand at an inlet pressure of 1 MPa The product of isentropic efficiency and power conversion efficiency is 0.53 and power generation is 300 W. Two-stage adsorption refrigeration system, when the temperature of the heat source changes from 75 ℃ to 95 ℃, the ranges of cooling capacity, energy efficiency and efficiency are respectively 1.42 ~ 2.2 kW, 13.4% ~ 16.8%, 18.1% ~ 16.6%. The organic Rankine cycle is connected in series with two stage adsorption refrigeration. When the heat source temperature is 98 ℃, the total energy efficiency of the system is 11.8% %, Power generation is 560 W, cooling capacity is 2.2 kW.