An experimental study of natural and mixed convection over cooled vertical room wall

Venko, Samo; Ventós, Daniel Vidal de; Arkar, Ciril; Medved, Sašo

doi:10.1016/j.enbuild.2013.09.014

Cited by 29 publications

(19 citation statements)

References 21 publications

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“…It was observed that the total cooling capacity did not vary much for local air velocity below 2 m/s. The influence of increasing the air velocity (up to 4 m/s) close to a vertical cold surface has been investigated by Venko et al [83]. The enhanced convective heat transfer at the surface decreases the need for mechanical cooling system.…”

Section: Coolingmentioning

confidence: 99%

Energy Flow and Thermal Comfort in Buildings

Dréau

2014

Energy Flow and Thermal Comfort in Buildings

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Section: Coolingmentioning

confidence: 99%

Energy Flow and Thermal Comfort in Buildings

Dréau

2014

Energy Flow and Thermal Comfort in Buildings

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“…They also determined that due to the limited cooling power of radiant cooling systems, the design of buildings had to be carefully done with special consideration to reducing the peak cooling required. Venko et al [32] presented an experimental study on mixed convection with a cooled vertical wall and found that mixed convection improved the effectiveness of the radiant system. They found the major problem with alternate cooling methods was the initial investment cost of alternatives to conventional air conditioning were much higher.…”

Section: Literature Reviewmentioning

confidence: 99%

Passive energy management through increased thermal capacitance

Carpenter

Mago

Luck

et al. 2014

Energy and Buildings

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Energy usage within the world is increasing at a drastic rate. Buildings currently consume a major amount of the total energy used within the United States, and most of this energy usage supports heating and cooling. This demand shows that new passive energy management systems are needed. The use of Increased Thermal Capacitance (ITC) is proposed as a new passive energy management system. To increase thermal capacitance, a piping system is either added into a building's walls or ceiling. In this paper, a building with ITC added is compared to a similar building without ITC using the simulation program TRNSYS. Along with a comparison between the walls and ceiling, several parameters are analyzed for their effect on the performance of the ITC. ITC was found to be effective especially when located in the ceiling, with the location, specific heat and tank size being the most important factors. iii ACKNOWLEDGEMENTS

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“…Better results can be achieved by integrating suitable mechanical ventilation systems, which can increase the convective heat transfer and improve the time response of the radiant system [18]. In this way, the needed size of the radiant surfaces can be reduced [18].…”

Section: Introductionmentioning

confidence: 99%

“…In these cases, mechanical ventilation of the treated indoor environment also needs to be carefully considered: when no additional air treatment for increasing convection is provided, the system may be able to prevent possible overheating only to a limited extent [12]. Better results can be achieved by integrating suitable mechanical ventilation systems, which can increase the convective heat transfer and improve the time response of the radiant system [18]. In this way, the needed size of the radiant surfaces can be reduced [18].…”

Section: Introductionmentioning

confidence: 99%

“…However, the TRNSYS simulation program is also used for dynamic simulations of buildings or parts of buildings that are equipped with radiant systems [12,13,18,27]. By performing TRNSYS computer simulations of a typical office floor equipped with a radiant cooling system, it has been found that occupant behavior can have an important influence on the cooling demand and thermal comfort [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Various Retrofitting Concepts of Building Envelope for Offices Equipped with Large Radiant Ceiling Panels by Dynamic Simulations

et al. 2015

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Abstract:In order to achieve significant savings in energy and an improved level of thermal comfort in retrofitted existing buildings, specific retrofitting concepts that combine new technologies and design need to be developed and implemented. Large radiant surfaces systems are now among the most promising future technologies to be used both in retrofitted and in new low-energy buildings. These kinds of systems have been the topic of several studies dealing with thermal comfort and energy utilization, but some specific issues concerning their possible use in various concepts for retrofitting are still poorly understood. In the present paper, some results of dynamic simulations, with the transient system simulation tool (TRNSYS) model, of the retrofitted offices equipped with radiant ceiling panels are presented and thoroughly analysed. Based on a precise comparison of the results of these simulations with actual measurements in the offices, certain input data for the model were added, so that the model was consequently validated. The model was then applied to the evaluation of various concepts of building envelopes for office retrofitting. By means of dynamic simulations of indoor environment it was possible to determine the benefits and OPEN ACCESSSustainability 2015, 7 13170 limitations of individual retrofitting concepts. Some specific parameters, which are relevant to these concepts, were also identified.

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An experimental study of natural and mixed convection over cooled vertical room wall

Cited by 29 publications

References 21 publications

Energy Flow and Thermal Comfort in Buildings

Energy Flow and Thermal Comfort in Buildings

Passive energy management through increased thermal capacitance

Evaluation of Various Retrofitting Concepts of Building Envelope for Offices Equipped with Large Radiant Ceiling Panels by Dynamic Simulations

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