Providing thermal comfort and saving energy inside the buildings using a ceiling fan in heating systems

Sadripour, Soroush; Mollamahdi, Mahdi; Sheikhzadeh, Ghanbar Ali; Adibi, Mohammad

doi:10.1007/s40430-017-0859-9

Cited by 17 publications

(23 citation statements)

References 18 publications

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“…Figure 2 represents the two-dimensional schematic diagram of the room that has been modeled by Sadripour et al (2017aSadripour et al ( , 2017bSadripour et al ( , 2017c. Based on the material that is used, we extracted thermal conductivity of materials and used them in our study.…”

Section: Numerical Modeling 21 Physical Modelmentioning

confidence: 99%

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The effects of using ceiling fans on human thermal comfort in a three-dimensional room with centralized heating including an occupant

Ashoori

Sheikhzadeh

Sadripour

2019

HFF

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Purpose The purpose of this study is to analyze the effect of using a ceiling fan with central heating system in the winter on thermal comfort and heat transfer rate in a three-dimensional numerically. Design/methodology/approach The geometry had certain dimensions, and an occupant was modeled to be in the room. In models which were used, the flow was turbulent, and turbulence models were used for simulating turbulence. Between all the models, k-ε model had best matching. Findings Results show that using the ceiling fan during the winter had an efficient and considerable effect on improving the thermal comfort and energy saving inside buildings. By the use of ceiling fan, the effective room temperature has increased by 2.5°C. Furthermore, results show that by using ceiling fan in the winter, the predicted mean vote and the predicted percentage dissatisfied indexes improved. At the end, the case Room 11-0.05-15 with temperature of 87°C for radiator and normal fan velocity of o.25m/s were the optimal model that caused the complete thermal comfort and reduced energy consumption up to 28 per cent. Originality/value In the present study, the effects of using the ceiling fans on human comfort condition and heat transfer field during the winter (heating system) are studied. Following are the goals for all models: getting the appropriate temperature for radiator so that thermal comfort condition can be applied at the height of 75 cm of the room, velocity for fan so that air speed can be 0.25m/s at the height of 2 m or lower of the room and position to place the fan.

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Section: Numerical Modeling 21 Physical Modelmentioning

confidence: 99%

“…Second, we extract external condition for a building in Tehran, located in Iran. The data is obtained from previous data HFF 29,10 Sadripour et al (2017aSadripour et al ( , 2017bSadripour et al ( , 2017c Figure 1.…”

Section: Numerical Modeling 21 Physical Modelmentioning

confidence: 99%

The effects of using ceiling fans on human thermal comfort in a three-dimensional room with centralized heating including an occupant

Ashoori

Sheikhzadeh

Sadripour

2019

HFF

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“…The governing equations for flow and heat transfer in the cavity can be written in the Cartesian tensor system as [45,46]:…”

Section: Governing Equationsmentioning

confidence: 99%

“…A common method employs the Boussinesq hypothesis to relate the Reynolds stresses to the mean velocity gradient as (4) [45,46]. Also he turbulent viscosity term µ t is to be computed from an appropriate turbulence model.…”

Section: Governing Equationsmentioning

confidence: 99%

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Numerical Investigation of a Corrugated Heat Source Cavity: A Full Convection-Conduction-Radiation Coupling

Sadripour¹

2017

AJAE

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Abstract:In present study a numerical analysis of complex heat transfer (turbulent natural convection, conduction and surface thermal radiation) in a rectangular enclosure with a heat source has been carried out. The finite volume method based on SIMPLEC algorithm has been utilized. The effects of Rayleigh number in a range from 10 8 to 10 11 , internal surface emissivity 0≤ε˂1 on the fluid flow and heat transfer have been extensively explored. Detailed results including temperature fields, flow profiles, and average Nusselt numbers have been presented. In this investigation it has been tried to study the shape of heat source influence on heat transfer and fluid field in the considered domain. According to results in low emissivity values usage of circular obstacles is recommended. Although in high emissivity values using rectangular obstacles lead to more efficiency.

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Electric Fans

Yang

et al. 2023

Indoor Environment and Sustainable Building

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Providing thermal comfort and saving energy inside the buildings using a ceiling fan in heating systems

Cited by 17 publications

References 18 publications

The effects of using ceiling fans on human thermal comfort in a three-dimensional room with centralized heating including an occupant

The effects of using ceiling fans on human thermal comfort in a three-dimensional room with centralized heating including an occupant

Numerical Investigation of a Corrugated Heat Source Cavity: A Full Convection-Conduction-Radiation Coupling

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