mlsc冷水机组制冷毕设

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1、MLSC66冷水机组制冷毕设华中科技大学文华学院毕业设计MLSC66水冷活塞冷水机组制冷系统设计2012年5月20日华中科技大学文华学院毕业设计目录摘要······················································1Abstract···················································2前言······················································31.方案论证·······································

2、········41.1流程选择············································41.2换热器的选择········································41.2.1冷凝器的选择···································41.2.2蒸发器的选择···································41.3制冷剂的选择········································51.4节流装置的选择····························

3、··········51.5压缩机的选择········································62.过程论述················································72.1已知参数············································72.1.1制冷循环的lgp-h图······························72.1.2单供冷工况······································72.2制冷循环热力计···················

4、··················72.2.1单位质量制冷量·································72.2.2单位容积制冷量·································72.2.3单位绝热功·····································82.2.4制冷系数·······································8I华中科技大学文华学院毕业设计2.2.5制冷剂质量流量·································82.2.6实际输气量··············

5、·······················82.2.7压缩机理论功率·································82.2.8单位冷凝热·····································82.3冷凝器的热力计算···································82.3.1冷凝器传热管的设计计算与校核····················82.3.2冷凝器负荷及流量计算···························102.3.3冷凝结构的初步规划·····························1

6、02.3.4管内水侧表面传热系数···························112.3.5计算管外R22蒸气冷凝表面传热系数···············122.3.6计算传热系数K和面积热流量qf0···················122.3.7计算所需的传热面积·····························142.3.8计算冷却水侧流动阻力···························142.3.9冷凝器的结构设计·······························142.4蒸发器的设计计算·····················

7、··············152.4.1制冷剂流量Gr的确定····························152.4.2初步结构设计···································152.4.3管内R22的表面传热系数·························162.4.4水侧表面传热系数的计算·························192.4.5传热系数的计算·································2