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Frontiers in Energy

Front. Energy    2020, Vol. 14 Issue (3) : 644-648     https://doi.org/10.1007/s11708-017-0453-y
RESEARCH ARTICLE
Performance of rolling piston type rotary compressor using fullerenes (C70) and NiFe2O4 nanocomposites as lubricants additives
Ruixiang WANG1, Yihao ZHANG2(), Yi LIAO3
1. Beijing Engineering Research Centre of Sustainable Energy and Buildings, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2. Beijing Institute of Architectural Design, Beijing 100045, China
3. Zhuhai Lingda Compressor Co., Ltd., Zhuhai 519100, China
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Abstract

A novel way for a compressor to improve its coefficient of performance was proposed in this paper. Fullerenes (C70) and NiFe2O4 nanocomposites were modified by span 80 and dispersed in refrigeration oil by solid grinding (SG). Besides, the tribological properties of the nanocomposites were investigated using a four ball friction tester. The results show that when the mass concentration of fullerenes nanocomposite is higher than 60 ppm and the concentration of nano-oil is 2 g/L, the friction coefficient decreases from 0.13 to 0.06 which means the wear is reduced. The coefficient of performance of the compressor under the air conditioning test condition can be raised by 1.23%.

Keywords rotary compressor      friction coefficient      nanocomposite materials      coefficient of performance      fullerenes (C70)     
Corresponding Author(s): Yihao ZHANG   
Online First Date: 20 February 2017    Issue Date: 14 September 2020
 Cite this article:   
Ruixiang WANG,Yihao ZHANG,Yi LIAO. Performance of rolling piston type rotary compressor using fullerenes (C70) and NiFe2O4 nanocomposites as lubricants additives[J]. Front. Energy, 2020, 14(3): 644-648.
 URL:  
http://journal.hep.com.cn/fie/EN/10.1007/s11708-017-0453-y
http://journal.hep.com.cn/fie/EN/Y2020/V14/I3/644
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Ruixiang WANG
Yihao ZHANG
Yi LIAO
Fig.1  TEM scan NiFe2O4 nano refrigeration oil
Item Parameter values
Dynamic viscosity (40°C)
Density(15°C)/(kg?L–1)
Flash point/°C
Pour point/°C
29.6
0.9115
176
-40
Tab.1  Typical properties of base stock
Fig.2  Four-ball friction tester
Fig.3  Compressor tester
Fig.4  Flowchart of refrigerating compressor performance
Condensing temperature/°C Evaporating temperature/°C Supercool/°C Suction temperature/°C Ambient temperature/°C
Experiment condition 54.4±0.3 7.2±0.2 46.1±0.1 35.0±0.2 35.0±0.2
Tab.2  Test condition of compressor
Fig.5  Friction and wear reduction percentage
Fig.6  Friction coefficient and its repetition
Fig.7  Variation of oil temperature
Type of compressor Specimen Refrigerating capacity/W Input power/W
QX-C202E030 gA
QX-C202E030 gA
QX-C202E030 gA
QX-C202E030 gA
56EP
New 1#
56EP
New 2#
3289.5
3279.8
3215.3
3245.4
1047
1040.6
1037.2
1034
Tab.3  Results of refrigerating capacity test of compressor
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