| 摘要: |
| 为解决空气制冷技术对气源的依赖问题，同时简化系统回收膨胀功，本文以高速电机驱动的无油气浮轴承压缩-膨胀一体机为核心部件，搭建了采用开式逆增压循环的全新风家用空气制冷系统实验台，可实现膨胀机、压缩机进出口的温度、压力、流量测量，并可与焓差室对接，获得制冷系统的制冷量和送风参数。在标准空调工况下进行了多个转速下的性能测试，额定转速为38 000 r/min时，制冷量为1.6 kW。送风温度随转速升高而降低，制冷量随转速升高而增大，基于该特点，空气制冷系统有直接送风和送风温度可调的优势，使空气制冷技术在新风空调领域的应用成为可能。 |
| 关键词: 全新风 空气制冷 逆布雷顿循环 透平膨胀机 |
| DOI： |
| 投稿时间：2021-04-22 修订日期：2021-07-23
|
| 基金项目:本文受陕西高校青年创新团队资助。 |
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| Performance Test of Fresh-air Household Air-refrigeration System |
|
Wang Zhefeng1, Li Jinbo2, Chen Shuangtao1, Du Shunkai2, Xu Zhenkun2, Gao Zhuoxian2, Hou Yu1
|
| (1.School of Energy and Power Engineering, Xi'an Jiaotong University;2.Guangdong Midea Refrigeration Equipment Co., Ltd.) |
| Abstract: |
| Air refrigeration has been extensively applied to the fields of aircraft environmental control and food refrigeration. However, these scenarios are equipped with high-pressure air sources or separate air compressors, which limits the flexible application of air refrigeration technology, and the overall coefficient of performance (COP) is low. A high-speed centrifugal compression-and-expansion integrated machine driven by a high-speed motor can considerably simplify the system and improve the COP by recovering the expansion work. This study uses a high-speed motor-driven oil-free floating bearing compression-expansion integrated machine as the core component to build a fresh-air household air-refrigeration system with an open reverse booster cycle. The temperature, pressure, and flow of the expander and compressor inlet and outlet of the system is measured, and the system is connected with an enthalpy difference chamber to obtain the refrigeration capacity and air supply parameters of the refrigeration system. Performance tests are conducted at multiple speeds under standard air-conditioning conditions. At a rated speed of 38 000 r/min, the cooling capacity is 1.6 kW. The supply-air temperature decreases and the cooling capacity increases with an increase in speed. Based on this feature, the air refrigeration system has the advantages of a direct air supply and adjustable supply-air temperature, which enables air-cooling technology in the field of fresh-air conditioning applications. |
| Key words: fresh air air refrigeration reverse Brayton cycle turboexpander |
