變濃度容量調(diào)節(jié)熱泵的實(shí)驗(yàn)研究.pdf

1、洳專：≥～嗜碩士學(xué)位論文⑧作者姓名叢塑螢指導(dǎo)教師睦出明塾援提交日期星QQ魚生旦一r，，～浙江大學(xué)顧十學(xué)位論文ExperimentalStudyonCapacityControlofAHeatPumpSystembyChangingtheCompositionofRefrigerantMixturesCongHaiying仍倒m如ofRefrigerationandCryogenicsZhejiangUniversiffHanszlmu，

2、310027)ABSTRACTThecapacitycontrolbychangingthecompositionofrefrigerantmixturescanbedefinedasthemodulationofcoolingorheatingcapacityofasystemthroughchangingthecompositionofthemixtumrefrigerantsinthesystemaccordingtocharac

3、teristicsofthezcotropicmixturesAgoodmodulationeffectcouldbeobtainedthroughthismethodincomparisonwithothercapacityregulationmethodsTbbespecificadditionalenergyconsumptionbesidesmanyproblemssuchascompressorsympatheticvibra

4、tionrefrigerantleakageectCallbeavoidedSoithasapromisingapplicationfutureThisthesisstudiesexperimentallyontheperformanceofanovelvariablecompositionheatpumpsystemThemainresearchcontentsareasfollows：1Thedevelopmentandrecent

5、statusofcapacitycontrolbychangingthecompositionofrefrigerantmixturesathomeandabroadarebrieflyreviewedBasedontheconventionalsystems，anovelcapacitycontrolheatpumpsystemwasresearchedinwhichavariablecompositiondeviceisusedin

6、thehighpressuresectionofthecycle2AnexperimentapparatusforthisnovelcapacitycontrolheatpumpisbuiltupTheoperationperformanceofthesystemisinvestigated部ingR32瓜134amixturesasrefrigerantinthesystem3ThePIDautomaticcontrolprincip

7、lesandalgorithmsarediscussedBasedonthetheorytheautomaticcontrolofthetemperaturesofinletwatertocondenserandoutletrefrigerantfromevaporatorisachieve&KEYWORDS：Refrigerantmixture；variablecomposition；capacitycontrol；PIDautoma