Int. J. Energy Res.
 1999
DOI: 10.1002/(sici)1099-114x(19990625)23:8<675::aid-er505>3.0.co;2-f
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Theoretical and experimental study of efficiency factor, heat transfer and thermal heat loss coefficients in solar air collectors with selective and nonselective absorbers

A. Hachemi
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Cited by 11 publications

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“…f R = 0.085 e −0.25 (14) The experimental results were compared with the results derived from analytical methods shown in Equations (13 and 14). The average deviations in Nusselt number and friction factor were obtained as 2.5% and 4.73%, respectively.…”
Section: Validation With Experimental Results
mentioning
confidence: 99%
“…Although the thermal efficiency of SAHs can be improved by design modifications, dimensional adjustments, and material selection. The effectiveness of heat transfer between the absorber plate and the working fluid plays a critical role in maximizing energy gain while keeping energy consumption low, as studied by [3,[13][14][15][16][17][18]. Tubular SAHs (TSAHs) offer theoretical advantages over FP-SAHs due to their large surface area, tube curvature, and orientation toward the sun during the day.…”
Section: Introduction
mentioning
confidence: 99%
See 1 more Smart Citation
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…f R = 0.085 e −0.25 (14) The experimental results were compared with the results derived from analytical methods shown in Equations (13 and 14). The average deviations in Nusselt number and friction factor were obtained as 2.5% and 4.73%, respectively.…”
Section: Validation With Experimental Results
mentioning
confidence: 99%
“…Although the thermal efficiency of SAHs can be improved by design modifications, dimensional adjustments, and material selection. The effectiveness of heat transfer between the absorber plate and the working fluid plays a critical role in maximizing energy gain while keeping energy consumption low, as studied by [3,[13][14][15][16][17][18]. Tubular SAHs (TSAHs) offer theoretical advantages over FP-SAHs due to their large surface area, tube curvature, and orientation toward the sun during the day.…”
Section: Introduction
mentioning
confidence: 99%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“……”
Section: Methods
mentioning
confidence: 99%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…4 Many studies have been carried out to increase the efficiency of air collectors. Hachemi 5 discussed the heat loss and efficiency for selective and non-selective absorber plate solar air collectors. He found that the selectivity of the absorber plate would not play an important role in a well-insulated solar collector with a fan system that allows fully developed turbulent flow and high heat transfer.…”
Section: Introduction
mentioning
confidence: 99%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
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