Indoor thermal comfort assessment using PCM based storage system integrated with ceiling fan ventilation: Experimental design and response surface approach

Alizadeh, Mostafa; Sadrameli, S.M.

doi:10.1016/j.enbuild.2019.02.020

Cited by 51 publications

(20 citation statements)

References 30 publications

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“…One of the approaches for reducing energy consumption in buildings and improving interior thermal surroundings is the integration of phase change material (PCM) into a building or building services system, which was first applied for thermal storage in buildings in 1980 [12], to improve the efficiency of thermal storage [13,14]. Experiments that used PCMs in trombe walls [15,16], wall boards [17,18], shutters or windows [19], ceiling boards [20,21], and roofs [22,23,24] have reported reduced energy consumption.…”

Section: Introductionmentioning

confidence: 99%

“…Yasin et al made the chilled PCM ceiling model by simulating massive thermo-active building elements with PCM, which corresponded to the real scale building data [20]. Next, PCM was used in buildings with a ceiling fan-assisted ventilation system to improve indoor thermal comfort and to shift cooling/heating energy demand away from peak hours [21]. Chou et al improved the metal-sheet roofing structure by using PCM, which can reduce heat transfer through the roof to the indoor space and maintain indoor comfort for longer [22].…”

Section: Introductionmentioning

confidence: 99%

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Thermal Effectiveness Enhancement of Autoclaved Aerated Concrete Wall with PCM-Contained Conical Holes to Reduce the Cooling Load

et al. 2019

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This work investigates and improves the thermal dynamics of autoclaved aerated concrete (AAC) wall containing phase change material (PCM). The PCM is paraffin wax loaded into conical holes drilled into the AAC. Filled AAC with three different numbers of PCM-filled holes (2, 3, and 4 conical holes, which are designated as AAC-2H, AAC-3H, and AAC-4H, respectively) as well as the unfilled original AAC were both tested under two different conditions: indoors (with controlled temperature) and outdoors (with actual weather). For the indoor experiment, a heater was used as a thermal source and set up to maintain the testing temperature at one of three levels: 40 °C, 50 °C, or 60 °C. The wall temperature was then measured on the surface with each horizontally-positioned wall as well as four different positions at various depths below the surface of the wall. It was found that AAC-4H was the optimum condition, which can produce outstandingly a time lag of approximately 27%, reduce a decrement factor of approximately 31%, and also decrease the room temperature. This reached approximately 9% when compared with that of ordinary AAC at the controlled testing temperature of 60 °C. All samples were further tested in actual weather to confirm the thermal performances of AAC-4H. Thermal effectiveness of AAC-4H was improved by extending approximately a 14.3% time lag, which reduces approximately a 4.3% decrement factor and achieving approximately 5% lower room temperature when compared with ordinary AAC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Effectiveness Enhancement of Autoclaved Aerated Concrete Wall with PCM-Contained Conical Holes to Reduce the Cooling Load

et al. 2019

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“…base unit) which uploaded the data to an online repository that allowed downloading the data in the excel file. All the sensors were and San Martín, 2000;Hill and Hunter, 1966;Alizadeh and Sadrameli, 2019).…”

Section: Physical Parameters Measurementmentioning

confidence: 99%

Effect of indoor environmental quality on visual comfort and productivity in office buildings

Kaushik

Arif

Ebohon

et al. 2021

JEDT

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Purpose The Purpose of this paper is to identify statistical relationships between visual environment and occupant productivity. Visual environment is one of the most important indoor environmental quality (IEQ) parameters, and it directly impacts occupant productivity in offices. The literature outlines the significance of the impact. Still, there is a lack of investigation, statistical analysis and inter-relationships between the independent variables (IEQ factors), especially in the hot and arid climate. Design/methodology/approach This study presents a research study investigating the effects and shows statistical relationships between IEQ on occupant comfort and productivity. The study was conducted in the Middle East, and data was collected for 12 months. It used the response surface analysis to perform analysis. Findings This study outlined seven unique relationships highlighting the recommended range, inter-dependencies. Results include that illumination has maximum effect on visual comfort and temperature, daylight having direct influence and relative humidity, wall type next to the seat and kind of workspace also impact visual comfort and productivity. These findings would help to improve occupant comfort and productivity in office buildings. It is recommended to include results and recommendations on design guidelines for office buildings. Originality/value This study presents the unique effects of non-visual IEQ parameters on visual comfort and productivity. This investigation also provides a unique method to develop the statistical relationship between various indoor environmental factors and productivity in different contexts and buildings.

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“…At present, in addition to parametric analysis [ 29 ] and efficiency optimization [ 30 ], the international research on PCM ceilings has focused more on the innovation of geometry. Alizadeh et al [ 31 ] tested a ceiling fan-assisted ventilation system coupled with PCM. Based on the result, the proposed system has the potential to shift cooling/heating energy demand away from peak hours.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of PCM Ceiling Coupling with Earth-Air Heat Exchanger for Building Cooling

Liang

et al. 2020

Materials

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In recent years, the systematic application of phase change materials (PCM) is continuously developing. In this paper, an innovative PCM ceiling coupled with earth-air heat exchanger (EAHE) cooling system was proposed for building cooling. The system aimed to combine the cooling capacity of soil and the energy storage capacity of PCM, thus improving the indoor thermal environment. Performance of the system was tested by experimental method while data analysis focused on the indoor side. To research the effect of cold storage time on the performance of the system, two different operation strategies were adopted for comparison: 8-h cold storage strategy and 12-h cold storage strategy. Moreover, a control group was set up to observe the performance of the system on indoor temperature under the same weather conditions. The result showed that the experimental room in which we installed this system could reduce peak temperature by 2.1 °C under 8-h timed cold storage strategy and 2.7 °C under 12-h timed cold storage strategy. What is more, under the two operation strategies, temperature and heat flux of the PCM ceiling had similar distribution characteristics. Different strategies mainly affected the sustainability of the system and phase transition efficiency of the PCM ceiling.

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Indoor thermal comfort assessment using PCM based storage system integrated with ceiling fan ventilation: Experimental design and response surface approach

Cited by 51 publications

References 30 publications

Thermal Effectiveness Enhancement of Autoclaved Aerated Concrete Wall with PCM-Contained Conical Holes to Reduce the Cooling Load

Thermal Effectiveness Enhancement of Autoclaved Aerated Concrete Wall with PCM-Contained Conical Holes to Reduce the Cooling Load

Effect of indoor environmental quality on visual comfort and productivity in office buildings

Performance Analysis of PCM Ceiling Coupling with Earth-Air Heat Exchanger for Building Cooling

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