A model about energy analysis for vapor compression cycle is put forward.

建立了蒸气压缩式制冷系统的(火用)分析模型。

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With comprehensive analysis, two-stage compression cycle is applied to air-source heat pump to adapt to the low-temperature environment.

本文通过综合分析，选择将两级节流中间不完全冷却双级压缩循环应用于空气源热泵热水器以适用低温工况。

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As two means to get a low temperature, two-stage compression cycle and cascade cycle have their advantages of economical performance in different temperature range.

对于获取低温的两种手段—双级压缩循环和复叠循环来说，它们分别在不同的温区具有经济性优势。

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This would have involved a chain of Stirling units that use a cycle of compression and decompression in a fluid to get to low temperatures.

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Both Otto cycle(spark ignition) and Diesel cycle engines(compression ignition) engines can be made to run on multiple fuels(petroleum, ethanol, natural gas) The cost is only nominally more than single fuel engines.

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