Huifan Zheng

Distributed model predictive control for phase change material floor heating: multi-objective optimization of energy cost, comfort, and service life

Xin Xin, Huifan Zheng, Yanfeng Liu, Yong Zhou

cn (code pays fourni par la source)

Theoretical and experimental study on pumping characteristics of low-GWP refrigerants in solar ejector cooling system

Zhao Cheng-ming, Jiabin Wang, Xiaowei Fan, Tian Guoji et autres

Abstract This study evaluates two low-global warming potential (low-GWP) refrigerants—R1233zd(E) and R1234ze(Z)—for use in solar ejector refrigeration systems. A steady-state thermodynamic model is developed to compare their performance with baseline R134a across representative operating conditions. Key metrics include refrigerant pump power, system …

cn, ir, ar (code pays fourni par la source)

Experimental Analysis and Temperature Rise Modeling of Multistage Centrifugal Pumps for Solar Ejector Refrigeration Systems

Chengming Zhao, Jiabin Wang, Xiaowei Fan, Huifan Zheng

This study presents an integrated experimental–modeling investigation of the thermal behavior of a multistage centrifugal refrigerant pump in solar ejector refrigeration systems (SERS). A temperature-rise prediction model is formulated strictly from energy conservation with viscous dissipation and validated on a closed-loop test …

cn, ir (code pays fourni par la source)

Low-resistance design method for butterfly valves via a combination of multiple control points

Yifei Yin, Angui Li, Huifan Zheng

cn (code pays fourni par la source)

Experimental study on the performance of quasi-two-stage compression heat pump with R32/R1270 for district heating in cold regions

Fujun Ju, Chutian Xiao, Weihang Wu, Jiafeng Wu et autres

cn (code pays fourni par la source)

Exploration of University Teachers’ Digital Literacy and Enhancement Pathways in the Context of Virtual Teaching and Research Communities: A Case Study of the Energy and Power Engineering Major

Shiyuan Wang, Huifan Zheng

In the context of the deep integration of intelligent digital technologies and higher education, virtual teaching and research communities serve as novel grassroots teaching organizations, providing a crucial platform for teacher development. Teachers’ digital literacy directly determines the quality of these communities, …

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Study on performance optimization of ejector in solar ejector-compression combined refrigeration system

Xinyu Zhang, Shuang Zeng, Huifan Zheng, Jiabin Wang et autres

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Numerical investigation of ventilation performance in an impinging jet system with high-level placement

Chen Wang, Huifan Zheng, Yin Liu, Ke Hu et autres

The indoor ventilation performance of an impinging jet ventilation (IJV) system with high-level placement in non-occupied zone was comprehensively investigated using numerical simulation methods. Combined with response surface methodology (RSM), the differences in thermal comfort and energy efficiency between high-level and low-level …

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Study of the performance of a photovoltaic-driven solar ejector refrigeration system

Huifan Zheng, Jiabin Wang, Xinyu Zhang, Mengyuan Li et autres

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Investigation on the optical path of aerogel glazing system based on the 3D structure

Yang Liu, Yujie Wang, Xueling Li, Youming Chen et autres

cn, hk (code pays fourni par la source)

Experimental study on the substitution potential of R1270 and R290 in an instant heat pump for domestic hot water and their temperature distribution characteristics

Fujun Ju, Qinglei Liu, Haoran Wang, Jiafeng Wu et autres

cn (code pays fourni par la source)

Performance analysis of solar-air source heat pump heating system coupled with sand-based thermal storage floor in rural inner Mongolia, China

Pengli Yuan, Feiyang Huang, Lin Duanmu, Caixia Zhu et autres

The solar-air source heat pump (SASHP) heating system has gained significant attention in rural clean heating renovations. Nonetheless, the lack of low-cost thermal storage terminals in rural areas results in low energy utilization and high electricity consumption. This study proposes a SASHP …

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