Heat transfer performance of twisted-tube dry-expansion evaporator

doi:10.11949/j.issn.0438-1157.20161299

CIESC Journal ›› 2017, Vol. 68 ›› Issue (4): 1318-1325.DOI: 10.11949/j.issn.0438-1157.20161299

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Heat transfer performance of twisted-tube dry-expansion evaporator

YIN Yingde^1,2,3, ZHU Dongsheng^1,2,3, SUN Jinfei^1,2,3, LI Xiuzhen^1,2,3, LIU Feng⁴, WANG Hong⁴

1 Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
2 Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
3 Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China;
4 TCL Air Conditioner(Zhongshan) Co. Ltd., Zhongshan 528427, Guangdong, China

Received:2016-09-18 Revised:2016-11-18 Online:2017-04-05 Published:2017-04-05
Supported by:
supported by the Science and Technology Innovation Project(2014HK100283) and China Southern Chile Valley Introduced Innovative Team (Shun Fu Letter No. [2014]365).

螺旋扁管干式蒸发器的传热性能

尹应德^1,2,3, 朱冬生^1,2,3, 孙晋飞^1,2,3, 李修真^1,2,3, 刘峰⁴, 王洪⁴

1 中国科学院广州能源研究所, 广东广州 510640;
2 中国科学院可再生能源重点实验室, 广东广州 510640;
3 广东省新能源和可再生能源研究开发和应用重点实验室, 广东广州 510640;
4 TCL空调器(中山)有限公司, 广东中山 528427

通讯作者: 尹应德
基金资助:
广东美的制冷设备有限公司院市合作项目（科技创新项目）(2014HK100283)；中国南方智谷引进创新团队（顺府办函[2014]365号）。

Abstract

Abstract:

The objective of this paper is to study the heat transfer performance of twisted-tube dry-expansion evaporator (TDE) and conventional baffle dry-expansion evaporator (BDE). The effect of evaporating temperature (T_e), condensing temperature (T_c), Reynolds number (Re_o) outside tube and heat flux (q_i) on heat transfer performance was investigated. The results showed that with the increase of T_e, Re_o and q_i, the heat transfer performances of TDE and BDE were increased, while with the increase of T_c, both of the heat transfer performances were decreased. The air-cooled heat pump (ACHP) applied with TDE and BDE was tested, respectively. The results showed that at the same cooling state the overall heat transfer coefficient (K) of TDE was 36.3% higher than that of BDE, and the ACHP's cooling coefficient of performance (COP) was increased by 6.0%. At the same heating state, the K of TDE was 41.7% higher than that of BDE and the ACHP's heating COP was increased by 15.8%. It was proved that TDE applied in ACHP was feasible, and its performance was better than BDE.

Key words: twisted-tube, dry-expansion evaporator, heat transfer coefficient, phase change, thermodynamics, vaporization

摘要：

对螺旋扁管干式蒸发器（TDE）和常规折流板干式蒸发器（BDE）的传热性能进行实验研究。研究了蒸发温度（T_e）、冷凝温度（T_c）、管外壳程流体Reynolds数（Re_o）和热通量（q_i）对传热性能的影响。研究表明，随着T_e、Re_o和q_i的增大，TDE和BDE的传热性能均提高。随着T_c的增大，TDE和BDE的传热性能降低。对装配TDE和BDE的风冷热泵分别进行了测试，测试表明，在相同制冷工况下，TDE的总传热系数比BDE提高了36.3%，风冷热泵的制冷性能系数（COP）相应地提高了6.0%；在相同制热工况下，TDE的总传热系数比BDE提高了41.7%，风冷热泵的制热COP值相应地提高了15.8%；说明TDE可应用于风冷热泵，且其性能优于BDE。

关键词: 螺旋扁管, 干式蒸发器, 传热系数, 相变, 热力学, 汽化

CLC Number:

TU831.4

YIN Yingde, ZHU Dongsheng, SUN Jinfei, LI Xiuzhen, LIU Feng, WANG Hong. Heat transfer performance of twisted-tube dry-expansion evaporator[J]. CIESC Journal, 2017, 68(4): 1318-1325.

尹应德, 朱冬生, 孙晋飞, 李修真, 刘峰, 王洪. 螺旋扁管干式蒸发器的传热性能[J]. 化工学报, 2017, 68(4): 1318-1325.

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Heat transfer performance of twisted-tube dry-expansion evaporator

螺旋扁管干式蒸发器的传热性能

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