Experimental study of thermal condition in a room with hydronic cooling radiant surfaces

Fonseca, Néstor

doi:10.1016/j.ijrefrig.2010.12.019

Cited by 23 publications

(16 citation statements)

References 6 publications

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“…In addition, most studies employed test chambers and computer modeling [1,3,6,[10][11][12][13][14][15][16]. However, the performance of an in-situ system is usually not the same as that tested in a laboratory or calculated using computer models because it is exposed to a dynamic environment.…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of performance of radiant heating/cooling ceiling panel system

Yoshidomi

Ooka

et al. 2015

Energy and Buildings

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Section: Introductionmentioning

confidence: 99%

Field evaluation of performance of radiant heating/cooling ceiling panel system

Yoshidomi

Ooka

et al. 2015

Energy and Buildings

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“…C. Kochendorfer [9] Evaluates the cooling capacity in an environment where there is no heat exchange with the outside The amount of cooling capacity may vary, based on the surface temperature of the wall N. Fonseca [3] N. Fonseca et al [10] Estimates the cooling capacity of the panel based on the external load M. De Carli et al [11] The cooling capacity of the ceiling radiation panel is estimated using unsteady state analysis in consideration of the external load Z. Tian et al [12] The cooling capacity of the panel is calculated based on the window to the wall ratio considering the influence of the window-installed envelope EN14240 [13] Since the material enclosing the CRCP could affect the cooling capacity of the panel, the adiabatic boundary condition is maintained to prevent the influence of the envelope NT VVS 078 [14] Same as EN14240…”

Section: Author or Organization Issuesmentioning

confidence: 99%

“…The values and ranges of these factors affect every heat transfer process and are derived as shown in Table 5 based on previous research and international standard analysis [3,4,7]. The sol-air temperature of Group 1 is the ambient temperature of the building located at 36 degrees north latitude.…”

Section: Values and Ranges Of Influencing Factorsmentioning

confidence: 99%

“…CRCP can be applied not only to homes but also to spaces with large ceiling areas such as classrooms [2]. In order to eliminate the thermal load efficiently, it is crucial to estimate the cooling capacity of the CRCP [3]. For accurate evaluation, it is necessary to evaluate the cooling capacity on the boundary condition when the panels are installed in the actual building ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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The objective of this study is to establish boundary conditions to evaluate the cooling capacity of the Cooling Radiant Ceiling Panel (CRCP) considering the environment of a room equipped with the CRCP. The current study investigated the boundary conditions and derivation techniques from previous studies. Based on the results of the analysis, a heat transfer model was derived for a room fitted with CRCP. In addition, the heat transfer model was used to derive the factors affecting the cooling capacity of the CRCP and each factor was simulated and verified through this model. The effects of these factors on the capacity of the CRCP was established by using various boundary conditions. To verify the validity of the simulation model, the experimental results were compared with the cooling capacity for a specific case. As a result, it was established that even for the same panel, there was a variance in the cooling capacity of the CRCP based on the boundary conditions and that the influence of the surface exposed to the outdoors had more implications. Consequently, this study presents the influence factors to be considered when designing CRCP.

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“…The performance of these systems is extensively analyzed in various recent studies. Most of the research is based on either computer simulations, mainly computational fluid dynamics (CFD) studies or studies conducted in controlled laboratory environments [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. The research in real office settings is mainly focused on buildings located in warm and hot climate countries, dominated by cooling need [41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Cooling Period Thermal Comfort Assessment in Modern Open Office Landscape in Estonia

Kiil

Simson

Thalfeldt

et al. 2019

Preprint

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Local thermal comfort (TC) and draught rate (DR) has been studied widely. There has been more meaningful research performed in controlled boundary condition situations than in actual work environments involving occupants. TC conditions in office buildings in Estonia have been barely investigated in the past. In this paper, the results of TC and DR assessment in five office buildings in Tallinn are presented and discussed. Studied office landscapes vary in heating, ventilation and cooling (HVAC) system parameters, room units and elements. All sample buildings were less than six years old, equipped with dedicated outdoor air ventilation system and room conditioning units. The on-site measurements consisted of TC and DR assessment with indoor climate questionnaire (ICQ). The purpose of the survey is to assess the correspondence between HVAC design and the actual situation. Results show, whether and in what extent the standard-based criteria for TC is suitable for actual usage of the occupants. Preferring one room conditioning unit type or system may not guarantee better thermal environment without draught. Although some HVAC systems observed in this study should create the prerequisites for ensuring more comfort, results show that this is not the case for all buildings in this study.

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Experimental study of thermal condition in a room with hydronic cooling radiant surfaces

Cited by 23 publications

References 6 publications

Field evaluation of performance of radiant heating/cooling ceiling panel system

Field evaluation of performance of radiant heating/cooling ceiling panel system

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

A Comparative Study on Cooling Period Thermal Comfort Assessment in Modern Open Office Landscape in Estonia

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