The Design And Experiments Of Multi-function Shell And Tube Heat Exchanger For Heat Pipe Compound Environment Control Unit

For steam research compression/heat pipe environment compound control unit needs,based on miniaturization, system security reliability and good energy adjustmentcharacteristics as the goal, a condenser evaporator and accumulator for the integrationof multi-functional shell and tube heat exchanger were designed. The tube pass of themulti-functional shell and tube heat exchanger composed of many independentevaporator tube bunch is the evaporation side, through the refrigeration unit start-stopworking to control technology such as the numbers to adapt to the broad change of thethermal load. Shell side is for condensing, side of the second refrigerant in the indoorabsorbs heat and evaporates, then flows back to the heat exchanger, in turn, passes theentrance, flow plate, evaporation tube cluster, is stored at the bottom of the shell sideafter condensing and super cooling, the heat is captured by shielding pump. The heatexchanger has a compact structure, stable heat transfer, reliable operation, can fastresponse to the changes of object heat load relying on regulating fluid volume andliquid temperature. The main jobs include:(1) Collecting and analyzing technical dataat home and abroad, According to user requirement and object of air conditioning loadcharacteristics, making foundation for the design of multi-function shell and tube heatexchanger in pipe compound control unit project;(2) According to the principle of heatpipe compound control unit operation and control requirements, Design plan ofmulti-function shell and tube heat exchanger is put forward, design of60kwmulti-function shell and tube heat exchanger, and60kw heat pipe compoundexperiment platform is designed;(3) Assembling system for testing engineering samplesperformance, Analysis of the experiment results. Subject gets achievements:1)According to the heat pipe compound control unit operation control theory, completingthe design of the multi-function of shell and tube heat exchanger, and finishing the heatexchanger sample trial production;2) Finishing design of60kw heat pipe compoundenvironment control experiment platform, Combined with multi-functional shell andtube heat exchanger for the construction of the experiment platform;3)Making theexperiment of multi-functional shell and tube heat exchanger performance, Combinedwith the whole machine analyzing the result of the experiment. Experiments show thatmultifunctional shell and tube heat exchanger satisfies the requirement of the thermaldesign, The exchanger has good heat transfer performance and high stability, that is easy to control of heat pipe cycle working medium, In compression refrigeration mode ofcold quantity demand can be control through start-stop refrigeration unit numbers,which is benefits to energy conservation of unit.