Field studies on the energy consumption and thermal comfort of a nZEB using radiant ceiling panel and open-loop groundwater heat pump system in a cold region

Ye, Minzhi; Nagano, Katsunori; Serageldin, Ahmed A.; Sato, Hideki

doi:10.1016/j.jobe.2023.105999

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…Displacement ventilation and independent temperature and humidity control systems are more common in China and the US. In contrast, evaporative cooling and chilled beams are widely used in the European Union [39]. Integrated ventilation-heat pump systems are frequently employed in residential NZEBs.…”

Section: Energy Systems With Higher Efficiencymentioning

confidence: 99%

Overview of research and development of nearly zero energy buildings in China

Yu,

Gao,

Yang

et al. 2024

NSO

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In recent years, the promotion of nearly zero-energy buildings (NZEBs) in China has emerged as a crucial step for the building industry in shifting towards a green and low-carbon future. Starting from scratch, the development of NZEBs in China has included the application and fundamental research, the compilation of national and local standards, and the rapid emergence of projects encompassing 23.89 million square meters nationwide. These efforts have yielded preliminary results in national standards, technology systems, technical roadmaps, and large-scale project demonstrations. However, challenges, including further reducing incremental costs, developing industries for retrofitting existing buildings into NZEBs, and expanding the range of policy incentives, remain to be addressed. This article provides an overview of the last decade's progress in NZEBs in China, covering key technological research, policy development, engineering demonstrations, and the current industrial development status. Finally, the prospects of the NZEB industry are discussed.

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Section: Energy Systems With Higher Efficiencymentioning

confidence: 99%

Overview of research and development of nearly zero energy buildings in China

Yu,

Gao,

Yang

et al. 2024

NSO

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“…PMV is recommended to be between −0.5 and 0.5. Indoor air temperature and humidity can affect PMV [23][24][25][26][27][28]. Therefore, both indoor temperature and humidity should be constrained to ensure the thermal comfort of the room, so that the variables are always optimized within the acceptable range.…”

Section: Optimized Setting Of Water Supply Temperaturementioning

confidence: 99%

Research on a Variable Water Supply Temperature Strategy for a Ground-Source Heat Pump System Based on TRNSYS-GENOPT (TRNOPT) Optimization

Cao

Zhou

Wang³

et al. 2023

Sustainability

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An office building located at Jinan equipped with ground-source heat pump (GSHP) system was selected as the research object. The GSHP system model was established using TRNSYS software. With the total energy consumption of the system as the objective function, several control strategies were proposed for the optimization work of water supply temperature at the load side of the heat pump unit. Firstly, a variable water temperature control strategy was adjusted according to the load ratio of the unit. In addition, the TRNSYS-GENOPT (TRNOPT) optimization module in TRNSYS was used to find the optimal water supply temperatures for different load ratios. After simulating and comparing the system’s energy consumption under the three control strategies, we found that the total annual energy consumption under the variable water supply temperature scheme is less than that under the constant water supply temperature scheme by 10,531.41 kWh. The energy saving ratio is about 5.7%. The simulation found that the total annual energy consumption under the optimized water supply temperature based on TRNOPT is lower than that under the variable water supply temperature scheme by 1072.04 kWh, and it is lower than that under the constant water supply temperature scheme by 11,603.45 kWh. The annual energy saving ratio of the system is about 6.3%. It is concluded that the optimized water supply temperature scheme based on TRNOPT has a better energy saving effect than the first two water supply temperature schemes.

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