A sensitivity analysis of the design parameters for thermal comfort of thermally activated building system

Samuel, D.G. Leo; Nagendra, S.M. Shiva; Maiya, M.P.

doi:10.1007/s12046-018-1033-5

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…The authors conclude that this system, coupled with a passive ventilation system, increases its feasibility in climates with unfavorable conditions and works with a fluid at relatively high temperatures. To study the internal diameter of the heat exchanger pipes, the thermal conductivity of the pipes, and the thickness of the roof slab and floor Leo Samuel et al, [53] analyzed the influence of those parameters of TABS on thermal comfort. They used a model built in COMSOL Multiphysics that was validated using experimental data obtained in the authors' previous work.…”

Section: Indoor Temperature Behavior Of Buildings With Tabs Installed In Several Building Componentsmentioning

confidence: 99%

A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

Villar-Ramos¹,

Hernández-Pérez²,

Aguilar-Castro³

et al. 2022

Preprint

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In recent years, several alternatives for improving the thermal comfort conditions inside buildings have been proposed. Among these alternatives, Thermally Activated Building Systems (TABS) have become of interest due to the benefits this technology brings to the building sector. The TABS are embedded in different building components and exchange heat with building envelope to improve the indoor air temperature. This review presents relevant results presented in the literature on the thermal behavior of TABS, the different types of TABS configurations, and the main parameters of TABS studied such as pipe separation, fluid inlet temperature, fluid velocity, and volumetric flow rate. The potential of TABS to improve thermal comfort conditions and provide energy savings is also discussed. Further, this study presents the different modes of application.

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Section: Indoor Temperature Behavior Of Buildings With Tabs Installed In Several Building Componentsmentioning

confidence: 99%

A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

Villar-Ramos¹,

Hernández-Pérez²,

Aguilar-Castro³

et al. 2022

Preprint

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“…Simulation of thermal performance of a single room with TABS was shown in [83]. Diurnal variation of operative temperature was up to 6 • C. Simulations and measurements of the TABS system combined with free-hanging acoustic ceiling units were presented in [56].…”

Section: Vertical Temperature Profilementioning

confidence: 99%

“…Floor temperature was 3 °C higher. Simulation of thermal performance of a single room with TABS was shown in [83]. Diurnal variation of operative temperature was up to 6 °C.…”

Section: Internal Air Temperature and Relative Humiditymentioning

confidence: 99%

Selected Aspects of Indoor Climate in a Passive Office Building with a Thermally Activated Building System: A Case Study from Poland

Michalak

2021

Energies

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Modern buildings with new heating, ventilation and air conditioning (HVAC) systems offer possibility to fit parameters of the indoor environment to the occupants’ requirements. The present paper describes the results of measurements performed in an office room in the first Polish passive commercial office building during four months of normal operation. They were used to calculate parameters describing thermal comfort: vertical air temperature profile, floor surface temperature, predicted mean vote (PMV) and predicted percent of dissatisfied (PPD). Obtained results confirmed good thermal conditions in the analysed room. The average temperature of the floor’s surface varied from 20.6 °C to 26.2 °C. The average vertical air temperature, calculated for working days, was from 22.5 °C to 23.1 °C. The temperature difference between the floor and 5 cm below the ceiling was from −0.9 °C to 6.3 °C. The PMV index varied from 0.52 to 1.50 indicating ‘slightly warm’ sensation, in spite of ‘neutral’ reported by employees. Also measured cooling and heating energy consumption was presented. The performed measurements confirmed the ability of thermally activated building system (TABS) to keep good thermal conditions.

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“…It also concluded that the performance is related to the climatic conditions of local regions. Meanwhile, research in different climatic region in India by Samuel et al, [12] has found that the TABS coupled with cooling tower (CT) has achieved a higher cooling performance in dry climates compared to humid zone, in which, floor and roof cooling could reduce operative temperature about 9.5 o C in hot and dry region, while it would only reduce 4.4 o C in humid area. Many researchs has been conducted to improve the TABS performance for humid climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Inlet Air Humidity Control on a Novel Indirect Condensative Cooling Performances in Achieving Air Thermal Comfort

Wijaksana¹,

Winaya²,

Sucipta³

et al. 2023

ARFMTS

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The objective of this research is to investigate the effect of controlling inlet air relative humidity on the performance of solid dry pad based indirect condensative cooling (SDP-ICC) system, in an effort to have a better air thermal comfort. The main evaporative cooling parameter such as cooling efficiency, cooling capacity, and temperature drop, condensation rate and energy efficiency ratio would be observed, together with the final dry and wet bulb air temperature and relative humidity in respect to reach the standard air thermal comfort. During the experiment test, the inlet air would be heated respectively using 1.0 kW, 1.5 kW and 2.0 kW heater in a climate chamber before it passed through to the solid dry pad, to be cooled indirect condensatively. The air velocity would be set on 11.3 m3/. The test results indicate that to achieve an air thermal comfort significantly in the evaporative and or condensative cooling system, the air should need to be treated with more than one thermal process, rather than cooling only. In this research, the SDP-ICC has only achieved the air thermal comfort in respect to its relative humidity of 67.3%, 55.65% and 44.3% respectively for heating capacity of 1.0 kW, 1.5 kW and 2.0 kW. The highest SDP-ICC cooling performance has been achieved on 1.5 kW heating capacity, in which it has reached 1.9 kW, 1.83, 3.4oC and 0.237 m3/hr respectively for cooling capacity, energy efficiency ratio, temperature drop and condensation rate. It can be concluded that by heating the inlet air relative humidity in evaporative and or condensative cooling system, it can be resulted the product air which has met the standard air thermal comfort.

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A sensitivity analysis of the design parameters for thermal comfort of thermally activated building system

Cited by 13 publications

References 21 publications

A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

Selected Aspects of Indoor Climate in a Passive Office Building with a Thermally Activated Building System: A Case Study from Poland

Effect of Inlet Air Humidity Control on a Novel Indirect Condensative Cooling Performances in Achieving Air Thermal Comfort

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