Effects of orientation and structure on solar radiation interception in Chinese solar greenhouse

In order to further improve the utilization of solar energy in Chinese Solar Greenhouse (CSG), this paper systematically studied the effects of orientation and structure on solar radiation interception in CSG. A solar radiation model has been developed based on the previous research, which taking solar motion law, meteorological data, and optical properties of materials into consideration. The established model was used to optimize the orientation and structure of CSG. The analysis of structure considered two major structural parameters, which are the ridge height and the horizontal projection of the rear roof. Moreover, the widely used Liao-Shen type Chinese solar greenhouse (CSG-LS) has been taken as the prototype in the present research, and the measured data of the typical clear day was used for the model validation. The results showed that the ridge height has a remarkable influence on the solar energy captured by CSG-LS. Compared with the optimization of a single factor, the comprehensive optimization of orientation and structure can increase the solar radiation interception of the rear wall by 3.95%. Considering the limiting factor of heat storage-release capacity and the shading effect on the greenhouse structure, the optimal lighting construction of the CSG-LS (with a span of 9.0 m) was specified as 7~9° from south to west of azimuth angle, 4.5~4.7 m ridge height, and 1.4~1.6 m horizontal projection of the rear roof at 42°N latitude. The proposed solar radiation model can provide scientific guidance for the CSG-LS construction in different areas.

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Effects of Aspect Ratios on Average Daily Solar Energy Collection for Different Flat-Plate Collector Arrays in Winter Months

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.368-370.1228 ◽

2013 ◽

Vol 368-370 ◽

pp. 1228-1231

Author(s):

Fen E Hu ◽

Sheng Xian Wei ◽

Neng Bang Hou

Keyword(s):

Solar Radiation ◽

Solar Energy ◽

Aspect Ratio ◽

Flat Plate ◽

Solar Collector ◽

Radiation Model ◽

Aspect Ratios ◽

Solar Radiation Model ◽

Flat Plate Collector

A solar radiation model to determine solar energy collection on solar collector array with different aspect ratios has been developed. The relations between the aspect ratio and the average daily solar radiation collection on the collector array have been deeply studied. The results show that there is an optimum aspect ratio to maximize the solar energy collection on the collector arrays. The optimum aspect ratios of the 1000 m2 collector array for Haikou, Kunming, Lhasa and Beijing are 10/1, 1/3, 5/1 and 10/1.The optimum aspect ratios of 1000 m2, 500 m2, 200 m2 and 100 m2 collector arrays for Kunming are 1/3, 3/1, 7/1 and 1/5, respectively.

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Modeling and Analysis of Solar Energy Collected by High Altitude Solar UAV’s Surface

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.644-650.234 ◽

2014 ◽

Vol 644-650 ◽

pp. 234-237

Author(s):

Yi Zhang ◽

Long Bin Liu ◽

Dong Xu Liu

Keyword(s):

Solar Radiation ◽

Solar Energy ◽

Infrared Light ◽

Total Power ◽

Solar Panels ◽

Radiation Model ◽

Modeling And Analysis ◽

Aircraft Model ◽

Solar Radiation Model ◽

Solar Powered

This paper proposed a numerical model to investigate the characteristics of solar energy collected by the UAV’s surface in different flight conditions. The novel model consists of a solar radiation model and a solar-powered aircraft model. The solar radiation model describes the process of the sunlight (including visible and infrared light) reaching the surface of the panels, and key effective factors are included. The solar-powered aircraft model describes a conventional layout fixed wing aircraft model with solar panels on the upper surface of the wing. The whole model was solved numerically by a computer program developed with C language to calculate the total power that the panels absorbed under different conditions. The visual and numerical results were presented and discussed in details.

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Estimating Roof Solar Energy Potential in the Downtown Area Using a GPU-Accelerated Solar Radiation Model and Airborne LiDAR Data

Remote Sensing ◽

10.3390/rs71215877 ◽

2015 ◽

Vol 7 (12) ◽

pp. 17212-17233 ◽

Cited By ~ 25

Author(s):

Yan Huang ◽

Zuoqi Chen ◽

Bin Wu ◽

Liang Chen ◽

Weiqing Mao ◽

...

Keyword(s):

Solar Radiation ◽

Solar Energy ◽

Airborne Lidar ◽

Lidar Data ◽

Energy Potential ◽

Radiation Model ◽

Downtown Area ◽

Solar Radiation Model ◽

Airborne Lidar Data

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SOLAR RADIATION MODEL FOR DEVELOPMENT AND CONTROL OF SOLAR ENERGY SOURCES / SAULĖS SPINDULIAVIMO MODELIS FOTOVOLTINIŲ ELEKTRINIŲ PROJEKTAVIMUI IR VALDYMUI

Mokslas - Lietuvos ateitis ◽

10.3846/mla.2016.932 ◽

2016 ◽

Vol 8 (3) ◽

pp. 289-295

Author(s):

Dominykas Vasarevičius ◽

Modestas Pikutis

Keyword(s):

Solar Radiation ◽

Solar Energy ◽

Meteorological Data ◽

Weather Conditions ◽

Cloud Layer ◽

Total Solar Radiation ◽

Radiation Model ◽

Point Tracking ◽

Solar Radiation Model ◽

Power Point

The model of solar radiation, which takes into account direct, diffused and reflected components of solar energy, has been presented. Model is associated with geographical coordinates and local time of every day of the year. It is shown that using analytic equations for modelling the direct component, it is possible to adopt it for embedded systems with low computational power and use in solar tracking applications. Reflected and diffused components are especially useful in determining the performance of photovoltaic modules in certain location and surroundings. The statistical method for cloud layer simulation based on local meteorological data is offered. The presented method can’t be used for prediction of weather conditions but it provides patterns of solar radiation in time comparable to those measured with pyranometer. Cloud layer simulation together with total solar radiation model is a useful tool for development and analysis of maximum power point tracking controllers for PV modules. Pateikiamą saulės spinduliavimo modelį sudaro trys komponentai: tiesioginio spinduliavimo, sklaidos ir atspindžių. Modelyje numatyta galimybė jį susieti su fotovoltinės elektrinės vietovės geografinėmis koordinatėmis, metų diena ir vietos laiku. Modelio komponentuose panaudotos analitinės formulės nereikalauja didelių skaičiavimo resursų. Tai leidžia modelį taikyti didžiausios galios taško sekimui skirtose įterptinėse sistemose. Sklaidos ir atspindžių komponentai leidžia nustatyti fotovoltinių modulių efektyvumą elektrinės įrengimo vietovėje. Debesų modelis sudarytas remiantis gaunamais statistiniais meteorologiniais duomenimis. Pateiktas modelis negali būti naudojamas oro sąlygų prognozei. Modeliu imituojamas saulės spinduliavimas atkartoja rezultatus, gautus matuojant piranometru. Saulės spinduliavimo modelis, įvertinantis dangaus debesuotumą, yra naudingas įrankis kuriant fotovoltinių modulių didžiausios galios sekimo elektronines sistemas.

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A Global Solar Radiation Model for the Design of Solar Energy Systems

Asian Journal of Scientific Research ◽

10.3923/ajsr.2008.231.238 ◽

2008 ◽

Vol 1 (3) ◽

pp. 231-238 ◽

Cited By ~ 8

Author(s):

Ridha Fethi Mechlouch ◽

Ammar Ben Brahim

Keyword(s):

Solar Radiation ◽

Solar Energy ◽

Energy Systems ◽

Global Solar Radiation ◽

Radiation Model ◽

Solar Radiation Model

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Evaluation and Comparison of Temperature-Based Models for The Prediction of The Monthly Average of Daily Global Solar Radiation for Baghdad City- Iraq

Iraqi Journal of Science ◽

10.24996/ijs.2020.61.3.9 ◽

2020 ◽

pp. 533-539

Author(s):

Awras H. Ajil

Keyword(s):

Solar Radiation ◽

Solar Energy ◽

Meteorological Data ◽

Global Solar Radiation ◽

Radiation Model ◽

Climate Conditions ◽

First Order ◽

Monthly Average ◽

Suitable Climate ◽

Solar Radiation Model

The solar energy is the major source of power for the future and an important source of renewable energy in Iraq and the world. Suitable climate conditions for solar energy are available in Iraq, especially the high temperature in the summer season which extends for more than six months in the year. Hence, the global solar radiation is abundant with high intensity, which is very essential in applicable models for researchers and solar applications. Therefore, nine first-order regression empirical equations of Angstrom-type correlations were used to estimate the more appropriate global solar radiation model for Baghdad city. Two equations were developed empirically in this work, using the most available and easy to get meteorological data, which is the temperature value in various forms. The results of the comparison between the real and calculated values showed reasonable agreement for most equations (including the development of R2- at 99%) as well as the least values of types of errors RMSE and MBE. As an exception, two equations of models failed in this study because of inability to apply to such climate conditions of Baghdad city.

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