期刊文献+

空气源热泵空气侧换热器结构参数对结霜特性的影响 被引量:6

Research on Frosting Characteristic of Air Source Heat Pump under Different Structure Parameters of Airside Heat Exchanger
下载PDF
导出
摘要 目的为解决空气源热泵冷热水机组冬季运行时空气侧换热器表面结霜问题,提高机组的综合运行性能,延长机组运行时间.方法采用分布参数法建立微分方程,并进行离散求解.结果分别计算了不同地区不同工况下,采用不同翅片间距、翅片管管径、管间距时,结霜速率、霜的密度、霜的厚度、空气侧压降及换热量等随时间的变化.不同工况下,空气侧换热器的结构参数不同,对机组性能的影响也不同.结论增大翅片间距可以延缓结霜,但对于不同湿度的地区,翅片间距应取不同的值. This article studies the solutions to the problem of the frost formed on the surface of airside heat exchanger when air source heat pumps run in winter, In order to improve the synthetical running performance of the unit, to prolong running time of the unit. Using the distribution parameter method, established a differential equation, and made its discrete solutions, in this paper, the dynamic values of the frosting rate, density and thickness of frost, the pressure drop and heat flux are calculated under conditions of different distance of fins, diameter and distance of pipes. The result shows that the frost on airside heat exchanger will act differently on the performance of a unit when its structure parameters changed. The frosting course can be delayed by increasing the distance of fins. The distance of fins should vary with relative humidity for different district.
出处 《沈阳建筑大学学报(自然科学版)》 EI CAS 2006年第3期458-461,共4页 Journal of Shenyang Jianzhu University:Natural Science
基金 国家自然科学基金资助项目(50278021)
关键词 空气源热泵 空气侧换热器 结构参数 结霜 air source heat pump airside heat exchanger structure parameter frost
  • 相关文献

参考文献8

  • 1Jia X, Tsa C P. Distributed Steady and Dynamic Modelling of Dry-expansion Evaporators[J]. Int. J. of Refrig, 1999(22): 126-136.
  • 2Wang H, Touber S. Distributed and Non - steadystate Modelling of an Air Cooler[J]. Int. J. of Refrig,1991, 14(2):98-111.
  • 3姚杨,马最良.空气源热泵冷热水机组空气侧换热器结霜模型[J].哈尔滨工业大学学报,2003,35(7):781-783. 被引量:16
  • 4Ameen F R. Study of Frosting of Heat Pump Evaporators[J].ASHRAE Trans, 1993, 99(1):61-71.
  • 5姜益强,姚杨,马最良.空气源热泵结霜除霜损失系数的计算[J].暖通空调,2000,30(5):24-26. 被引量:58
  • 6Kondepudi S N, O' Neal D L. Performance of Finned-Tube Heat Exchangers under Frosting Conditions:Ⅰ.Simulation Model[J]. Int. J. of Refrig, 1993, 16(3): 175-180.
  • 7姚杨,姜益强,马最良.翅片管换热器结霜时霜密度和厚度的变化[J].工程热物理学报,2003,24(6):1040-1042. 被引量:28
  • 8Mao Y, Besant R W, Eng P, et al. Frost Characteristics and Heat Transfer on a Flat Plate under Freezer Operating Correlations [J]. Ashras Trans, 1999 (2):231-259.

二级参考文献13

  • 1姚杨,马最良.空气源热泵冷热水机组室外换热器结霜工况下数学模型的建立[J].流体机械,2001,29(10):50-52. 被引量:12
  • 2巨永平.京津地区小型空气-空气热泵供热性能研究及使用可行性分析:硕士学位论文[M].天津:天津大学,1988..
  • 3井上宇市 范存养等(译).空气调节手册[M].北京:中国建筑工业出版社,1986..
  • 4王剑峰.空气热源热泵冬季结霜特性研究[J].洁净与空调技术,1997(1):24-27. 被引量:6
  • 5WANG H, TOUBER S. Distributed and non-steady-state modelling of an air cooler[ J]. Int J of Refrig, 1991,14 , (2) :98- 111.
  • 6TURAGA M, LIN S, FAZIO P P. Correlations for heat transfer and pressure drop factors for direct expansion air cooling and dehumidifying coils [ J]. ASHRAE Trans,1988,94(2) :616 - 630.
  • 7RICE C K. The effect of void fraction correlation and heat flux assumption on refrigerant charge Inventory predictions[J]. ASHRAE Trans, 1987,93( 1 ) :341 -367.
  • 8S N Kondepudi, D L O'Neal. Performance of Finned-Tube Heat Exchangers under Frosting Conditions: I. Simulation Model. Int J of Refrig, 1993, 16(3): 175-180.
  • 9J Martinez-Prias, S M Aceves. Effects of Evaporator Frosting on the Performance of an Air-to-Air Heat Pump. ASME Trans, 1999, 121(1): 60-65.
  • 10S M Sami, T Duong. Mass and Heat Transfer during Frost Growth. ASHRAE Trans, 1989, 95(1): 158-165.

共引文献97

同被引文献72

引证文献6

二级引证文献25

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部