CAJ | 학술논문

为了研究用于机械压汽海水淡化系统的双螺杆蒸汽膨胀压缩机热力性能，建立了压缩机和膨胀机热力模型。根据已知参数求解压缩机喷水量和轴功率，膨胀机进气温度和质量流量，将计算结果与热力压汽淡化系统进行比较。通过改变压缩机进、排气压力和膨胀机进气压力，对膨胀压缩机进行变工况性能分析。结果显示，压缩机进、排气压力会对压缩机喷水量和轴功率产生不同影响；膨胀机进气压力决定进气温度的高低，且存在最佳值。
위료연구용우궤계압기해수담화계통적쌍라간증기팽창압축궤열력성능，건립료압축궤화팽창궤열력모형。근거이지삼수구해압축궤분수량화축공솔，팽창궤진기온도화질량류량，장계산결과여열력압기담화계통진행비교。통과개변압축궤진、배기압력화팽창궤진기압력，대팽창압축궤진행변공황성능분석。결과현시，압축궤진、배기압력회대압축궤분수량화축공솔산생불동영향；팽창궤진기압력결정진기온도적고저，차존재최가치。
In order to study the thermal performance of twin-screw expander-compressor used for mechanical vapor compression seawater desalination system,the thermodynamic model of compressor and expander are built. Parameters like water spray mass flow rate and shaft power of the compressor,intake temperature and mass flow rate of the expander are calculated based on the known conditions,then the results are compared with thermal vapor compression seawater desalination system. Different compres-sor intake,exhaust pressure and expander intake pressure were chosen to analyze the variable condition performance of expander-compressor. The results show that the intake and exhaust pressure have different effects on shaft power and water spray mass rate of compressor;the intake pressure of the expander decides the intake temperature,and there exists an optimum value.