Field study and numerical investigation on heating performance of air carrying energy radiant air-conditioning system in an office

Pei, Peng; Gong, Gwo‐Ching; Deng, Xiaorui; Chun, Liang; Li, Wenqiang

doi:10.1016/j.enbuild.2019.109712

Cited by 29 publications

(7 citation statements)

References 46 publications

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“…Furniture might have a higher influence on radiant heating systems, experimental studies on a scaled model showed that the heat flux from a floor heating system was reduced by 30% when 40% of the floor was covered by furniture [35]. Peng et al [36] studied the ceiling, sidewall, and ceiling-sidewall composite heating systems using experimental and numerical studies. They found that the presence of furniture can reduce the local temperature by up to 1.2 0 C.…”

Section: Effect Of Radiator Position Furniture and Occupantsmentioning

confidence: 99%

Are radiators ready for the challenges of the future: A review of advancements in radiators

Puttige

Feng²,

Lu³

et al. 2022

E3S Web Conf.

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Radiators play an important role in providing a comfortable and safe indoor environment while maintaining high-energy efficiency. In the perspective of future climate change with expected larger temperature fluctuations and the rapidly changing heat supply and demand, it is required that the current radiator technology is adaptable. The heat supply is changing towards a lower supply temperature to enable an increase in energy efficiency and an increase in the share of renewable energy. Simultaneously, both the heat supply and demand are expected to have more variations in the future. An additional concern that has come into more focus after the experience with the COVID 19 pandemic is the prevention of the spread of infection in indoor environments. Researchers have extensively studied several innovations in radiator technologies and their deployment that addresses these challenges. Some of the solutions available in the literature include floor heating, ceiling heating, ventilation radiator, stratum ventilation. Researchers have used advanced modeling and experimental techniques to understand how to deploy different types of radiator technologies. This review summarizes solutions in the literature that address these challenges and identifies knowledge gaps that need to be addressed. In particular, this study explores the gaps in knowledge of practical issues, such as the position of furniture and the position of people, which have received less attention in the literature. Research that addresses the effect of radiators on ventilation and a healthy indoor environment is also of particular interest in this review.

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Section: Effect Of Radiator Position Furniture and Occupantsmentioning

confidence: 99%

Are radiators ready for the challenges of the future: A review of advancements in radiators

Puttige

Feng²,

Lu³

et al. 2022

E3S Web Conf.

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“…By combining all these measures, the refurbished air conditioning system reduced energy consumption by 50% while reducing acceptable internal thermal comfort. Pei Peng et al [17] presented an energy radiant air conditioning system containing a sidewall of the roof and investigated the ACERS composite heating performance of the sidewall of the roof with an air source heat pump by field test. The results show that the hybrid system can meet the heating needs of office buildings in south-central China and can save energy.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Evaluation of Thermal-cooling Loads of Office Buildings Using Carrier Software in Iran

Ghodusinejad¹,

Zahedi²,

Gitifar³

et al. 2022

j. of smar. build. and constr. technol.

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The importance and necessity of energy saving in the world have been discussed for many years, but achieving a logical and transparent solution isstill one of the main challenges and problems of the world’s economy. Therapid growth of energy consumption in the last two decades has caused thesecurity of the domestic energy supply of buildings to face serious problems. In this research, first by entering parameters such as the type of materials, doors and windows, and the type of soil on the floor connected to theground, etc. in the heat and cold load calculation software (HAP Carrier) asthe design calculations and then in the second step entering the specifications inferred from the Iran’s national building code as a reference for energy saving calculations, calculations are performed and compared as the firstcriterion, and finally these two outputs are compared. The actual energyconsumption and determination of the building energy consumption indexare determined as another criterion, as well as the degree of deviation fromthe actual consumption. The results showed that the theoretical method andthe thermal and refrigeration load calculations of the Zanjan Gas Companybuilding have 6% difference in cooling load but the heating load is about34% different, which means for cooling loads, the theoretical model can beused with high accuracy but for heating loads, the national building codeneeds fundamental changes.

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Section: Introductionmentioning

confidence: 99%

“…Stable air is often seen in rooms with floor cooling (Zhou et al 2019;Olesen 1997) or ceiling heating (Safizadeh et al 2019), where indoor air often experiences a lock-up effect (Bjørn and Nielsen 2002;Gao et al 2012), while unstable air environment often occurs in floor-heating (Dehghan and Abdolzadeh 2018) or chilledceiling rooms (Alamdari et al 1998), where strengthened forced or natural convection occurs (Zhou et al 2017). A recent novel air-carrying-energy radiant air condition system (Peng et al 2019(Peng et al , 2020) is found to be able to create different indoor air stability conditions by adjusting the heating and cooling mode of the terminal. In essence, the vertical temperature difference between the ceiling and the floor of a room would develop an indoor-air-stability-related buoyancy effect that regulates the air distribution in a way that is different from the Archimedes-related buoyancy effect that is caused by the temperature difference between an airflow current and its ambient environment, thereby the indoor air stability was also referred to as the background temperature effect (Gong and Deng 2017).…”

Section: Introductionmentioning

confidence: 99%

Assessment of personal exposure to infectious contaminant under the effect of indoor air stability

Deng

Gong

Chen

et al. 2021

Environ Sci Pollut Res

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The objective of this study is to understand the effect of indoor air stability on personal exposure to infectious contaminant in the breathing zone. Numerical simulations are carried out in a test chamber with a source of infectious contaminant and a manikin (Manikin A). To give a good visual illustration of the breathing zone, the contaminant source is visualized by the mouth of another manikin. Manikin A is regarded as a vulnerable individual to infectious contaminant. Exposure index and exposure intensity are used as indicators of the exposure level in the breathing zone. The results show that in the stable condition, the infectious contaminant proceeds straightly towards the breathing zone of the vulnerable individual, leading to a relatively high exposure level. In the unstable condition, the indoor air experiences a strong mixing due to the heat exchange between the hot bottom air and the cool top air, so the infectious contaminant disperses effectively from the breathing zone. The unstable air can greatly reduce personal exposure to the infectious contaminant in the breathing zone. This study demonstrates the importance of indoor air stability on personal exposure in the indoor environment and provides a new direction for future study of personal exposure reduction in the indoor environment.

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Field study and numerical investigation on heating performance of air carrying energy radiant air-conditioning system in an office

Cited by 29 publications

References 46 publications

Are radiators ready for the challenges of the future: A review of advancements in radiators

Are radiators ready for the challenges of the future: A review of advancements in radiators

Analysis and Evaluation of Thermal-cooling Loads of Office Buildings Using Carrier Software in Iran

Assessment of personal exposure to infectious contaminant under the effect of indoor air stability

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