A numerical investigation of fluid flow and heat transfer inside a room for floor heating and wall heating systems

Karabay, Hasan; Arıcı, Müslüm; Sandık, Murat

doi:10.1016/j.enbuild.2013.08.037

Cited by 76 publications

(31 citation statements)

References 29 publications

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“…Karabay et al [23] numerically investigated a comparative evaluation between a floor heating system and a wall heating system for Kocaeli province with an outdoor design temperature of À3 C. Computations were performed for three different water temperatures: 30 C, 40 C and 50 C. The main purpose of the study by Acıkg€ oz et al [24] was to numerically investigate the effects of the hot and cold wall temperatures of a room and the characteristic length on the average CHTC for an enclosure using both two-and three-dimensional models. Feustel [25] examined many studies on hydronic radiant cooling.…”

Section: Introductionmentioning

confidence: 98%

Analysis of a wall cooling system using a heat pump

2016

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a b s t r a c tIn this study, a vertical ground source heat pump wall cooling system that belongs to the Yıldız Renewable Energy House at the Davutpaş a Campus of Yıldız Technical University was studied both experimentally and theoretically. The principal objective was to perform a system analysis to determine the parameters that allow the energy usage of the cooling system to be as low as possible. For this reason, a system working in a low temperature regime was chosen. The examination includes energy and exergy analyses conducted during the period between 1 July and 30 September 2012, which is described as the "Summer Session". By using the data that were collected on a per-second basis during these processes and conveyed to a MySQL database, "The moments when the heat pump is activated" were detected, and the "Monthly Average Values" were analyzed. Thus, a theoretical analysis was conducted for the Cooling Session and its correlations. These correlations were used in the energy and exergy analyses. According to the analysis results, the energy and exergy efficiencies of the entire system were found to be 74.85% and 29.90%, respectively, and the Wall Heating Cooling System panels calculated the heat with energy and exergy efficiencies of 90.29% and 80.4%, respectively.

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Section: Introductionmentioning

confidence: 98%

Analysis of a wall cooling system using a heat pump

2016

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“…Recent studies of radiative heat transport in the inner spaces of buildings (i.e., in enclosures) avoid algebraic methods and prefer differential transport equations [14][15][16][17][18]. The main interest is focused on floor heating systems [14][15][16][17], but radiant panel systems situated on walls or ceilings are also investigated [18][19][20][21]. Coefficients of heat transfers at interiors or exteriors along with heat losses are often measured or calculated as well [20,[22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

General Model of Radiative and Convective Heat Transfer in Buildings: Part I: Algebraic Model of Radiative Heat Transfer

Ficker

2019

Acta Polytech

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Radiative heat transfer is the most effective mechanism of energy transport inside buildings. One of the methods capable of computing the radiative heat transport is based on the system of algebraic equations. The algebraic method has been initially developed by mechanical engineers for a wide range of thermal engineering problems. The first part of the present serial paper describes the basic features of the algebraic model and illustrates its applicability in the field of building physics. The computations of radiative heat transfer both in building enclosures and also in open building envelopes are discussed and their differences explained. The present paper serves as a preparation stage for the development of a more general model evaluating heat losses of buildings. The general model comprises both the radiative and convective heat transfers and is presented in the second part of this serial contribution.Keywords: Radiative heat transfer, view factor, radiosity, room envelope, radiative heat in interiors, heat loss.

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“…Although research on radiant surfaces has been mostly focused on structural floors and ceilings, evidence from several research studies suggests that radiant walls also present a potentially feasible solution for space heating and cooling [7][8][9]. Nevertheless, scientific studies related to radiant wall systems are relatively scarce, and research regarding the potential of their installation in existing buildings as a part of retrofit is lacking.…”

Section: Introductionmentioning

confidence: 99%

Radiant wall cooling with pipes arranged in insulation panels attached to facades of existing buildings

2019

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Radiant systems are being increasingly used for space heating and cooling of buildings. The contemporary research of radiant systems addresses mainly floor and ceiling structures. Research regarding the possibilities of their incorporation in wall structures is lacking, despite their potential advantages. This study addresses a radiant wall system manufactured according to a patent. The patented design involves panels that consist of pipes arranged in milled channels in thermal insulation. The potential advantage of this system is the fact that the thermally active panels can be attached to the facades of existing buildings as a part of their retrofit. Thereby, only minor interventions on the interior side of the retrofitted buildings are needed. To test and improve the design of the wall system, laboratory measurements and computer simulations were performed on a wall fragment for its operation under summer conditions. The results indicate a significant potential for improvement of the patented design by addressing the imperfections in the contact between pipe and wall. Inserting a metal fin between pipe and wall enhanced the cool distribution within the wall fragment considerably. From the three materials of the metal fin considered, using copper led to highest values of the cooling output, followed by aluminium. For these two metals the effect of increasing the thickness of the fin on the cooling output was small. On the contrary, the fin made of steel was the least efficient in terms of cool distribution. In this case the cooling output was most sensitive to the thickness of the fin.

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A numerical investigation of fluid flow and heat transfer inside a room for floor heating and wall heating systems

Cited by 76 publications

References 29 publications

Analysis of a wall cooling system using a heat pump

Analysis of a wall cooling system using a heat pump

General Model of Radiative and Convective Heat Transfer in Buildings: Part I: Algebraic Model of Radiative Heat Transfer

Radiant wall cooling with pipes arranged in insulation panels attached to facades of existing buildings

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