Fundamental experiment of pumpless Rankine-type cycle for low-temperature heat recovery
Fundamental experiment of pumpless Rankine-type cycle for low-temperature heat recovery
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DOI：
10.1016/j.energy.2010.12.007
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
N. Yamada;T. Minami;I. Welpe
中科院分区：
文献类型：
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作者：
N. Yamada;T. Minami;I. Welpe
提出了一种利用低温热源发电的新型无泵朗肯循环。新循环主要由一台膨胀机、两台换热器以及膨胀机和换热器的切换阀组成。采用切换阀方法（SVM）来控制循环，而不是使用工作流体泵。SVM使每个热交换器在用作蒸发器和用作冷凝器之间切换。在这种布置中，工作流体在两个热交换器之间来回流动，而没有工作流体泵。因此，新的循环不涉及由泵引起的问题。在第一个基本实验中进行，以澄清所提出的循环的可行性，通过使用膨胀喷嘴的膨胀机的功能进行了仿真。HFC245fa用作工作流体。实验结果证实了所提出的循环的工作原理，它有可能产生电力。所提出的周期的基本时变特性也示出和讨论。
This paper proposes a new pumpless Rankine-type cycle for power generation from low-temperature heat sources. The new cycle mainly consists of an expander, two heat exchangers, and switching valves for the expander and heat exchangers. Instead of using a working fluid pump, the switching valves method (SVM) is employed to control the cycle. The SVM makes each heat exchanger switch between functioning as an evaporator and functioning as a condenser. In this arrangement, the working fluid flows back and forth between the two heat exchangers without a working fluid pump. Therefore, the new cycle does not involve problems caused by a pump. In the first basic experiment carried out to clarify the feasibility of the proposed cycle, the function of the expander was emulated by using an expansion nozzle. HFC245fa was used as the working fluid. The experimental results confirm that the proposed cycle works and that it has the potential to produce power. Fundamental time-varying characteristics of the proposed cycle are also shown and discussed.