Statistical analysis of solar UVB and global radiation in Kuwait

Ghoneim, Adel A.; Kadad, Ibrahim M.; Altouq, Majida S.

doi:10.1016/j.energy.2013.07.027

Cited by 12 publications

(3 citation statements)

References 30 publications

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“…The selected models were compared to the Naive and ETS models for validation. The accuracy of the different models and their correlations were evaluated using the statistical parameter's mean percentage error (MPE), mean absolute error (MAE), mean absolute percentage error (MAPE), root-mean-square error (RMSE), and mean absolute scaled error (MASE) described in Equations ( 14)- (18) [45,46]:…”

Section: Methodsmentioning

confidence: 99%

The Development of ARIMA Models for the Clear Sky Beam and Diffuse Optical Depths for HVAC Systems Design Using RTSM: A Case Study of the Umlazi Township Area, South Africa

Mutombo

Numbi

2022

Sustainability

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The increasing demand for energy in the building sector is mostly due to heat, ventilation and air conditioning (HVAC) systems. In the absence of the clear sky beam optical depth (CSBOD) and clear sky diffuse optical depth (CSDOD), there is a challenge to determine the solar heat gain for different orientations of the surface areas of buildings for HAVC design. The purpose of this research is to determine CSBOD and CSDOB from the available solar radiation data for the calculation of the cooling load in buildings. The numerical values of CSBOD and CSDOD are determined from simulations using three years of measured clear sky beam and diffuse irradiance data for the Umlazi area as a case study. From these results, the autoregressive integrated moving average (ARIMA) for both CSBOD and CSDOD was obtained, with ARIMA (2,1,1) (1,1,0) [12] and ARIMA (3,1,0) (1,1,0) [12] for CSBOD and CSDOD, respectively. The obtained values of 0.68073 and 2.64413 for CSBOD and CSDOD, respectively, were used to calculate the cooling load due to the solar irradiance heat gain for the hottest month of February in a newly built room in Mangosuthu University of Technology (MUT). The value of 1124 W was obtained using the radiant time series method (RTSM). A further study can be performed to use these models for the long-term forecasting of the solar radiation cooling load for optimal control of the HVAC systems.

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Section: Methodsmentioning

confidence: 99%

The Development of ARIMA Models for the Clear Sky Beam and Diffuse Optical Depths for HVAC Systems Design Using RTSM: A Case Study of the Umlazi Township Area, South Africa

Mutombo

Numbi

2022

Sustainability

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“…There were two major methods in calculating the coefficients (a and b) using the intermediate variable m. The dependences of a and b on m can be obtained as: a ¼ À0:557 þ 0:211e Àðmþ4:743Þ=2:131 þ 5:257e Àðmþ4:743Þ=0:894 (13) b ¼ 0:787 þ 0:37e ÀðmÀ0:949Þ=1:224 À 0:544e ÀðmÀ0:949Þ=0:512 (14) By combining Equations (2) and (12)e(14), Y-UV4 model can be obtained. Linear regression between hourly observations and estimates were conducted (Fig.…”

Section: Uv Models Using Optical Air Mass and Clearness Indicesmentioning

confidence: 99%

Comparison of different UV models for cloud effect study

Wang

Gong

Luo

et al. 2015

Energy

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“…2 The highest average hourly radiation is attained in Summer during the months of May to September at 12.00 PM, peaking in June, while the lowest average occurs in the Winter months, with January recording the minimum average value. 3 The daily average temperature in the winter season is 14.4 C while it often exceeds 48 C in the summer season.…”

Section: Introductionmentioning

confidence: 99%

Energy saving and performance analysis of air‐cooled photovoltaic panels

Hussam

Khlefat

Sheard

2021

Intl J of Energy Research

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The efficiency of photovoltaic (PV) cells is known to degrade with temperature, which limits their efficacy in the many regions around the world having a climate featuring high ambient temperatures. This study reports on field experiments supported by numerical modelling using Ansys steady-state thermal solver that demonstrates improved PV cell performance when coupled with a passive natural-convection-driven heat sink. Heat sink fin spacing was optimized for hot climatic conditions. Experiments were conducted on a pair of PV modules, one fitted with the heat sink, the other serving as a control. Temperature data were acquired at 15 minute intervals from 6.00 AM to 5.30 PM at both the front and rear of the modules. The heat sink respectively improved solar-to-electrical conversion efficiency and power output by 35% and almost 55%, and led to panel temperature reductions of up to 4 C and 3 C.

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Statistical analysis of solar UVB and global radiation in Kuwait

Cited by 12 publications

References 30 publications

The Development of ARIMA Models for the Clear Sky Beam and Diffuse Optical Depths for HVAC Systems Design Using RTSM: A Case Study of the Umlazi Township Area, South Africa

The Development of ARIMA Models for the Clear Sky Beam and Diffuse Optical Depths for HVAC Systems Design Using RTSM: A Case Study of the Umlazi Township Area, South Africa

Comparison of different UV models for cloud effect study

Energy saving and performance analysis of air‐cooled photovoltaic panels

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