H. Zhang

Dr. H. Zhang


Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2015 in Advances in Mechanical Engineering
Verified
Journal Article
Open access
JLJiang-Feng Lou
Jiang-Feng Lou
HZH. Zhang
H. Zhang
RWRuixiang Wang
Ruixiang Wang
In this article, the performance of a domestic refrigerator employing isobutane and graphite nanolubricants as working fluids is investigated experimentally. The character of graphite nanoparticles and the nanolubricant was observed through scanning electron microscope, Fourier-transform infrared spectrometer, and dynamic light scattering. It is confirmed that the surface-modified graphite nanoparticles steadily suspend in the form of clusters for a long period of time. The application of the graphite nanolubricants with mass fractions of 0%, 0.05%, 0.1%, 0.2%, and 0.5% to domestic refrigerator was examined by a refrigerator test system according to the National Standard of China (GB/T 8059.1-4). The results showed that graphite nanolubricants work normally and safely in the refrigerator. There were certain reductions on pull-down time, discharge pressure, discharge temperature, suction pressure, and shell compressor temperature. In addition, power consumption of the refrigerator decreased 4.55% using graphite nanolubricant with a mass fraction of 0.1%, while the on-time rate also decreased as well as the pressure rate. Each test lasts for 15 days; the energy saving effect is stable.

1 May 2015 in Heat and Mass Transfer
Verified
Journal Article
Closed access
PDF file
SRShengjun Rui
Shengjun Rui
HZH. Zhang
H. Zhang
BZBohan Zhang
Bohan Zhang
Dongsheng WenDongsheng Wen
Dongsheng Wen

8 November 2016 in Advances in Mechanical Engineering
Verified
Journal Article
Open access
ZMZhaofeng Meng
Zhaofeng Meng
HZH. Zhang
H. Zhang
JQJinyou Qiu
Jinyou Qiu
MLMingjing Lei
Mingjing Lei
In this article, R1234ze(E), R152a, and three mixtures M1, M2, and M3 composed of R152a and R1234ze(E) (in the ratio of 60:40, 50:50, and 40:60, by mass, respectively) as drop-in replacements of R134a in vapor compression system were theoretically analyzed. The performance of the vapor compression system was compared in terms of compressor discharge temperature, volumetric cooling capacity, cooling capacity, compressor power consumption, and coefficient of performance. The results showed that R152a had better coefficient of performance as well as nearly equal volumetric cooling capacity and cooling capacity compared to R134a; however, flammable R152a running with high compressor discharge temperature was restricted. Cooling capacity of R1234ze(E) was far lower than that of R134a. M2 was selected as the best alternative for R134a. Volumetric cooling capacity of M2 and R134a was similar so that M2 can be used in R134a vapor compressor system without modifying compressor. Coefficient of performance of M2 was higher than that of R134a by about 3% with 7% lower cooling capacity and 10% lower compressor power consumption. Compressor discharge temperature of M2 was higher than that of R134a by about 2°C–5°C. It was concluded that M2 can primely be an energy conservation and environmental protection alternative to R134a in vapor compression system.

1 September 2015 in Advances in Mechanical Engineering
Verified
Journal Article
Open access
JQJinyou Qiu
Jinyou Qiu
HZH. Zhang
H. Zhang
XYXiaoming Yu
Xiaoming Yu
YQYingxia Qi
Yingxia Qi
JLJiangfeng Lou
Jiangfeng Lou
XWXi Wang
Xi Wang
The saturated flow boiling heat transfer coefficients and frictional pressure drops characteristics of R1234ze(E), R600a, and L-41b (R1234ze(E)/R32 (27/73 mass %)) inside an 8 mm inner diameter horizontal tube were investigated. The experiment was carried out at the saturation temperature of 20°C with heat flux ranging from 5.0 to 10.0 kW·m−2 and mass flux ranging from 200 to 400 kg·m−2·s−1. The influence of mass flux, heat flux, and quality on the heat transfer coefficients and frictional pressure drops were examined and discussed. The results show that the local heat transfer coefficients of R1234ze(E) are averagely 33% and 18% lower than those of R600a and L-41b, respectively. The frictional pressure drops of R1234ze(E) are 21% lower than those of R600a but 6% greater than those of L-41b. Meanwhile, the experimental data of local heat transfer coefficients and frictional pressure drops are compared with some well-known correlations available in literatures.

1 October 2020 in International Journal of Refrigeration
Verified
Journal Article
Closed access
SCShanshan Chen
Shanshan Chen
WWWeidong Wu
Weidong Wu
YYYingying Yang
Yingying Yang
HWHao Wang
Hao Wang
HZH. Zhang
H. Zhang

3 January 2021 in Journal of Thermal Science
Verified
Journal Article
Closed access
PDF file
WWWeidong Wu
Weidong Wu
LWLi Wang
Li Wang
XLXiang Li
Xiang Li
HLHui Liu
Hui Liu
HZH. Zhang
H. Zhang
BDBinlin Dou
Binlin Dou