CAJ | 학술논문

在一种太阳能驱动、采用喷雾吸收器并以板式换热器作为主要换热部件的LiNO3-NH3-He三工质扩散吸收式制冷系统中，根据试验测得的运行参数，以溶液的p-t-x西方程及物性方程、传热基础理论等为依据，提出了计算溶液换热器中溶液流量的方法，并利用综合传热系数k、传热单元数N_TU与换热器效率s研究了板式换热器作为LiN03-NH3-He扩散吸收式制冷系统发生器、冷凝器、溶液热交换器、溶液冷却器时的换热性能．试验与分析表明，板式换热器的换热面积及其内部流道中的流量（流速）对其综合传热性能具有较大影响；在介质流量一定时，板式换热器不宜考虑过大的面积预留量；板式溶液换热器内部流道宜采用多流程布置形式以强化传热、提高换热效率．
재일충태양능구동、채용분무흡수기병이판식환열기작위주요환열부건적LiNO3-NH3-He삼공질확산흡수식제랭계통중，근거시험측득적운행삼수，이용액적p-t-x서방정급물성방정、전열기출이론등위의거，제출료계산용액환열기중용액류량적방법，병이용종합전열계수k、전열단원수N_TU여환열기효솔s연구료판식환열기작위LiN03-NH3-He확산흡수식제랭계통발생기、냉응기、용액열교환기、용액냉각기시적환열성능．시험여분석표명，판식환열기적환열면적급기내부류도중적류량（류속）대기종합전열성능구유교대영향；재개질류량일정시，판식환열기불의고필과대적면적예류량；판식용액환열기내부류도의채용다류정포치형식이강화전열、제고환열효솔．
A LiNO3-NH3-He diffusion-absorption refrigeration system driven by solar energy is introduced, in which a spray absorber is used to enhance the heat and mass transfer, and plate heat exchangers (PHEs) used as generator, condenser, solution heat exchanger (SHE) and solution cooler, respectively. Besides, solution flow rates in the system are evaluated based on p-t-x and physical property equations of LiNO3-NH3 solution, principles of heat transfer, and parameters such as pressure, temperatures and flow rates. Heat transfer performances are also investigated according to the overall heat transfer coefficient k, number of heat transfer units NTU and heat exchanger efficiency ε. Experiments and analysis show that, in LiNO3-NH3-He diffusion-absorption refrigeration system, heat transfer area and solution flow rates of PHEs affect the overall heat transfer performance of the PHEs. Therefore, extra size on PHE is not recommended if the solution flow rate is kept constant, and inner passageways of PHEs should adopt multi-pass to enhance heat transfer.