Establishing Boundary Conditions Considering Influence Factors of the Room Equipped with a Ceiling Radiant Cooling Panel

Park, Sanghoon; Kim, Dongwoo; Joe, Goo-Sang; Ryu, Seong-Ryong; Yeo, Myoung-Souk; Kim, Kwang-Woo

doi:10.3390/en13071684

Cited by 8 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Internal heat gains increase the building's interior temperature and may considerably contribute to the building's thermal balance, especially in well thermally insulated objects [5,8]. The importance of IHG for thermal and energy performance of buildings were also addressed in [9][10][11][12]. In the subject literature, the terms "heat gains" and "heat loads" are often used interchangeably [7].…”

Section: Internal Heat Gainsmentioning

confidence: 99%

Internal Heat Gains in a Lunar Base—A Contemporary Case Study

2020

View full text Add to dashboard Cite

The Moon’s environmental conditions present limited opportunities for waste heat dissipation, so internal heat gains (IHG) are a key component of thermal balance in a lunar building. Despite the significant development in energy saving and energy storage technologies of the last thirty years, the issue of IHG in lunar buildings has not been readdressed since the early 1990s. This study is based on an inspection of internal heat sources conducted aboard LUNARES, the first European extraterrestrial analogue habitat. The equipment absent on LUNARES, but indispensable for an actual lunar base, was identified and accounted for, along with additional laboratory and maintenance equipment. Three main groups of internal heat sources were identified and studied in detail. Waste heat generated by electric devices was accounted for, along with occupational heat loads adjusted for lunar partial gravity conditions. Assuming a photovoltaic power source for the studied building, two alternative energy storage systems (ESS) were analysed as another source of waste heat. Depending on the time of lunar day and applied ESS, the nominal IHG were between 73 and 133 W/m2. The most significant internal heat sources in a lunar base are life support systems and potentially, regenerative fuel cells; thus, lithium–ion batteries were recommended for ESS. Within assumed parameter range, parametric study exhibited differences in IHG between 41.5 and 163 W/m2.

show abstract

Section: Internal Heat Gainsmentioning

confidence: 99%

Internal Heat Gains in a Lunar Base—A Contemporary Case Study

2020

View full text Add to dashboard Cite

show abstract

“…It was found that condensation was prevented because the minimum surface temperature was always higher than dew-point temperature. In addition, the use of openings or air circulators reduced the difference (∆θ) between the mean chilled water temperature and room air temperature, which is formulated as Equation (3).…”

Section: Cooling Capacity Analysismentioning

confidence: 99%

“…As closed-type CRCP systems separate a plenum and an occupied space, it is difficult to utilize cooled plenum air to cool the occupied space. This separation does not lead to problems for the top-insulated panels that minimize the heat transfer at the upper surface of CRCPs [3,4]. However, metal ceiling panels without top insulation, which are commonly installed in office buildings, can absorb heat from the plenum space [5,6].…”

Section: Introductionmentioning

confidence: 99%

Cooling Capacity and Energy Performance of Open-Type Ceiling Radiant Cooling Panel System with Air Circulators

2020

View full text Add to dashboard Cite

Ceiling radiant cooling panel (CRCP) systems are being increasingly applied to commercial buildings due to their high thermal comfort level and energy efficiency. It is recommended that CRCP systems should be operated at a relatively high chilled water temperature to prevent condensation and save energy. However, even though a high chilled water temperature is effective for achieving condensation-free operation and high chiller efficiency, it can lead to insufficient cooling capacity. In this study, a method of enhancing the cooling capacity of CRCP systems was investigated through mock-up chamber tests. The open-type installation of CRCPs and the combination of air circulators were used to enhance the cooling capacity and energy performance of CRCP systems. Experimental results showed that compared to a conventional CRCP system, the cooling capacity of an open-type CRCP system with air circulators increased by up to 26.2%, and its cooling energy consumption decreased by up to 26.4%. Additionally, the open-type CRCP system with air circulators reduced the difference between the room air temperature and mean chilled water temperature. Thus, the proposed system can operate at a relatively high chilled water temperature, which is effective for reducing condensation risk and cooling energy consumption.

show abstract

“…As diverse lifestyles emerge in modern society, which was once dominated by mass consumption, people's interests have shifted from quantity to quality, resulting in a heightened demand for improved quality of life. This includes a higher level of thermal comfort within buildings [1]. Consequently, radiant heating systems are being adopted as an alternative to address the discomfort caused by air currents discharged from convective heating systems during the winter period.…”

Section: Introduction 1background and Purposementioning

confidence: 99%

A Study on Establishing Thermal Output Conditions of Radiant Ceiling Heating Panels for Improving Thermal Comfort of Perimeter Zone in Buildings

Joe¹,

Park

2023

Applied Sciences

View full text Add to dashboard Cite

Amid concerns over airflow-induced transmission of the COVID-19 virus in buildings frequented by large numbers of people, such as offices, the necessity for radiant ceiling heating panels has increased. This is due to the concern that the airflows emitted from the convection heating systems installed near the ceiling or windows for winter heating may be a major cause of COVID-19 transmission. In this study, we aim to evaluate thermal comfort under various indoor and outdoor environmental conditions of a building and present the thermal output conditions of the radiant ceiling heating panel that can replace the convection heating system while ensuring comfort in the perimeter zone and handling the heating load. As a result, we were able to present, in a chart format, the thermal output conditions that can secure thermal comfort by analyzing the indoor airflow distribution depending on the surface temperature of the radiant ceiling heating panel, the interior surface temperature of the window, and the influence of internal heat generation. Moreover, through derived empirical formulas, we were able to determine the heating conditions of the panel that can secure the necessary heat dissipation while minimizing discomfort, such as downdrafts, even for indoor and outdoor conditions that were not evaluated in this study.

show abstract

Establishing Boundary Conditions Considering Influence Factors of the Room Equipped with a Ceiling Radiant Cooling Panel

Cited by 8 publications

References 14 publications

Internal Heat Gains in a Lunar Base—A Contemporary Case Study

Internal Heat Gains in a Lunar Base—A Contemporary Case Study

Cooling Capacity and Energy Performance of Open-Type Ceiling Radiant Cooling Panel System with Air Circulators

A Study on Establishing Thermal Output Conditions of Radiant Ceiling Heating Panels for Improving Thermal Comfort of Perimeter Zone in Buildings

Contact Info

Product

Resources

About