| As the depth development of building energy conservation and the promotion ofgreen building, using of solar hot water systems are also more and more widely. But inthe solar hot water system, the inclination of the collector is a more critical factoraffecting the application effect. Generally speaking, collector inclination is set to thesame geographic latitude or geographic latitude±10°, which is recommended in thenational or local standards on the application of solar hot water systems. China has avast nationwide distribution of solar energy resources, which is quite different fromarea to area. Sweeping approach is obviously not well adapted for the solar hot watersystems’ application.Firstly, a combination of the basic theory of geometry, optics, and integration ofexisting theoretical research has done, and then theoretical analysis of direct solarradiation, scattering radiation, reflected radiation which received by the collectorsurface under different inclination, at different times, different orientations completed,and calculated global solar radiation of different inclination collector surface atdifferent times, different orientation. On the basis of theoretical analysis, in order tofurther quantify the solar radiation received by the different collector surface, theVisual Basic6.0Chinese version was used to draw up the solar radiation calculationprogram. Based on the Chongqing typical meteorological year data, we carried outdynamic analysis and calculation of the annual8760hours due south orientations0°~90°inclination Angle of the collector surface solar radiation, and the results werestatistically analyzed. Statistical results show that the amount of solar radiationreceived by the surface of the collector for the year maximum inclination angle is0°,if focusing solely on the6,7,8month, angle of0°still is the maximum amount ofsolar radiation received in the. For the phenomenon which results is strikingly differentwith standard ahead, this article briefly discussed the small proportion of directradiation in the solar energy resources of Chongqing region.As the application of solar hot water In the Chongqing area has gradually trendsof wider, this article research the present application situation of solar hot water systemin Chongqing area, and in the light of two kinds of system (household solar hot watersystem and solar central heating water system) under the of existing solar energyresources conditions in Chongqing area, carry out matching analysis of the solar energy resources demand and supply. We found that under the solar energy resourcesconditions in this region, during5,6,7,8,9month the hot water provide by solar canmeet the hot water demand.For the confirmation of the solar best Angle verification theoretical analysis andcalculation, in Chongqing area we built solar hot water application test researchplatform whose collector is all glass vacuum tube, and collector Angle are0°and19.5°and29.5°and39.5°. During June, July and August, under the sunny day,cloudy day, cloudy day, rainy day, the weather changes days sum to5kinds of weatherconditions, the experimental test research were carried out respectively. And theamount of solar radiation received, hot water produced conditions (temperature, watervolume), and system efficiency of four kinds of Angle solar system under five kind ofweather conditions was studied. The study found that during June, July and August,when inclination Angle is0°, the collector surface receiving solar radiation is thelargest, about20.4%larger than when inclination Angle is39.5°. During June, Julyand August, average thermal efficiency of system is59.9%and inclination Angleslightly lower than efficiency of inclination Angle19.5°(63.1%), but when inclinationAngle is0°, water in the water tank temperature under high than other inclinationAngle.Finally, seeing from the application of solar hot water system in the June, July andAugust in Chongqing, this article suggested that the solar collectors of hot watersystem should be0°Angle in this area. |
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