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1.A thermal expansivity test device consisting of hating unit, attemperating unit, displacement transducer, recorder and so on, was developed to determine the thermal expansivity of new sand, clay-beaded sand, sodium silicate sand, resin bonded sand with the temperature or isothermally.
摘要铸造用砂热膨胀性测试装置，由加热装置、温控装置、移位传感器、记录仪等组成，可实现铸造用原砂（亦可用于粘土型砂、水玻璃型砂、树脂型砂等）的随温和等温热膨胀性测试。收藏指正
2.The performance of a real steady refrigeration plant is analyzed by using a method of finite time thermodynamics. The analytical relations between cooling load and pressure ratio,as well as between coefficient of performance (COP) and pressure ratio of real closed regenerated Brayton refrigeration cycles coupled to constant and variable temperature heat reservoirs are derived.
用有限时间热力学方法分析实际稳态制冷装置性能，导出了恒温和变温热源条件下实际闭式回热式布雷顿制冷循环制冷率与压力比和制冷系数与压力比之间的解析关系。收藏指正
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英汉释义
n. warmer