| 摘要: |
| 空气源热泵因性能稳定、使用方便等特点在房间供暖与空调等领域得到广泛应用，冬季室外换热器表面结霜和除霜是影响其系统性能的主要因素。本文概括了空气源热泵系统的结霜条件、无霜化以及各类热力与非热力除霜方法，重点阐述采用相变蓄热装置的各种热泵系统及其除霜方法，对研究报导中所应用的相变材料、蓄热换热器结构进行综述。最后对实现空气源热泵产品的无霜化或除霜高效化和持续供热的研究方向进行展望：可靠的吸附材料及其再生方法研发是通过干燥方法破坏除霜条件的技术需求；高压电场和超声波除霜方法需进一步完善，提高其稳定性和经济性；蓄热除霜有很大的市场潜力，但需优化系统及蓄热换热器设计，并深入相变材料的研究。 |
| 关键词: 空气源热泵 结霜 除霜 相变材料 蓄热 |
| DOI： |
| Received:December 01, 2017Revised:January 31, 2018 |
| 基金项目: |
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| Review of Frost-free and Defrost Methods for Air-source Heat Pump Systems |
|
Shen Jiubing1,2,3, Li Ziqiang1, Xing Ziwen2, Yu Yue3, Ge Meicai3
|
| (1.School of Energy and Power, Jiangsu University of Science and Technology;2.School of Energy and Power Engineering, Xi’an Jiaotong University;3.Nantong Huaxin Central Air Conditioning Co., Ltd.) |
| Abstract: |
| Air-source heat pumps have been widely used for room heating and air conditioning because of their stable performance and easy installation. The greatest performance limitation is the frosting and defrosting problem of the outdoor heat exchanger during winter. This study presents a review of the frosting conditions, frost-free method, and different defrosting methods for air-source heat pump systems. In particular, the system and principles of the application of heat storage technology for heat pump defrosting are summarized. The applied phase change material (PCM) and structures of heat storage exchangers based on different studies are also presented in this work. Finally, future research directions for realizing frost-free or effective defrosting and continuous heating of air-source heat pump products are discussed. These include the development of reliable adsorption materials and regeneration methods to overcome problems posed by frost. Methods of high-voltage field and ultrasonic defrosting must be further considered to improve stability and economy. The application of PCM for defrosting has good market prospects, but the design of heat pump systems and the structure of PCM exchangers must be optimized, and PCM should be further studied. |
| Key words: air-source heat pump frosting defrost phase change material heat storage |
