| 摘要: |
| 本文针对不同两级吸附工质对CaCl2-NaBr-NH3, CaCl2-BaCl2-NH3, SrCl2-BaCl2-NH3与 SrCl2-NH4Cl-NH3进行了实验研究，同时模拟了两级吸附制冷样机的工作性能。结果表明：SrCl2-NH4Cl-NH3与CaCl2-NaBr-NH3的循环吸附量可以分别达到理论值的95.4%与88.6%；对于不同两级吸附工质对，样机系统的COP、制冷量与SCP分别介于0.215~0.285、2~3.65 kW与161.4~260.74 W/kg；采用硫化石墨配置吸附剂能够大幅度提高两级制冷系统的SCP，以CaCl2-BaCl2-NH3为例，与采用普通石墨作为基质相比，采用硫化石墨的系统SCP最高可以提高40.2%。 |
| 关键词: 吸附 制冷循环 工质对 硫化石墨 |
| DOI： |
| 投稿时间：2017-02-03
|
| 基金项目:中国博士后科学基金(2015M581609)和国家自然科学基金（51606118）资助项目。 |
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| Experimental Investigation on Working Pairs for a Two-stage Sorption Refrigeration Cycle |
|
Jiang Long, Lu Huitong, Wang Ruzhu, Wang Liwei
|
| (Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University) |
| Abstract: |
| Recently, a CaCl2-BaCl2-NH3 chemisorption freezing cycle driven by a low-temperature heat source has drawn an increasing amount of attention. To develop a working pair with a more desirable performance than CaCl2-BaCl2-NH3, working pairs of CaCl2-NaBr-NH3, SrCl2-BaCl2-NH3, and SrCl2-NH4Cl-NH3 were investigated and compared. Most composite adsorbents were developed with a novel matrix of expanded natural graphite treated with sulfuric acid (ENG-TSA), leaving one serial with expanded natural graphite (ENG) for comparison. For SrCl2-NH4Cl-NH3 and CaCl2-NaBr-NH3, experimental results show that the maximum adsorption quantities are 95.4% and 88.6% of the theoretical values, respectively. Simulation results indicate that the best results are obtained from CaCl2-NaBr-NH3, and its specific cooling power (SCP) and coefficient of performance (COP) are as high as 260.74 W/kg and 0.285, respectively, which are 15.1% and 5.6% better than the values for CaCl2-BaCl2-NH3. It is also noted that, for different working pairs, the COP, cooling capacity, and SCP range from 0.215 to 0.285, 2 to 3.65 kW, and 161.4 to 260.74 W/kg, respectively. Comparisons also show that the ENG-TSA matrix effectively improves the SCP. For example, the SCP of CaCl2-BaCl2-NH3 is improved by 40.2%, when compared with a working pair with the ENG matrix. |
| Key words: sorption refrigeration cycle working pairs ENG-TSA |
