An experimental investigation of the effect of periphery height and ground temperature changes on the solar chimney system

Güneş bacası performansını veya verimini etkileyen çevre sıcaklığı, bacanın yüksekliği, kolektör çapı, bölgeningüneş ışınım değeri vb. Adıyaman üniversitesi yerleşke alanı içine özel katmanlı zemin (27 m çapında 0,5 mderinliğinde açılan dairesel çukura sırası ile alüminyum folyolu cam yünü, çakıl, kum, kırık cam paçacıkları ve en üstyüzeye asfalt) üzerine 0,004 m kalınlığında cam döşenen kolektör, 17 m yüksekliğinde 0,8 m çapında baca ve 0.05 –0.35 m yüksekliklere ayarlanabilen kolektör hava girişi dizayn edilerek güneş bacası sistemi kurulmuştur. Buçalışmada 22 Temmuz saat 13:00 de kolektör hava giriş kısmının, farklı yüksekliklerde (0.05 – 0.35 m ) iken (C2)noktasında sıcaklık, hava hızı ve kolektör altındaki sıcaklık ile özel imal edilen zeminin Adıyaman hava şartlarına(güneş ışınım değeri, çevre sıcaklığı, rüzgâr hızı) göre, 2 saat aralıklarla gün boyunca kolektörün altındaki zeminin,cam yüzeyin, kolektör altındaki ve çevre sıcaklıkları, çevre rüzgar hızı, bacanın içine montajı yapılacak olan türbininkonulacağı noktanın (C2) sıcaklık ve hava hızları incelenmiştir. Yapılan ölçümlerde kolektör hava giriş yüksekliğiartıkça güneş bacasının performansının düştüğü en ideal yüksekliğin 0,05 m olduğu, özel yapılan zeminin günlükgüneş ışınımı ve çevre sıcaklığı ile orantılı bir şekilde ısı depoladığı ve bu ısıyı gece kolektör ortamına verereksistemin performansını artırdığı görülmüştür. Güneş bacasında kolektörün altındaki zeminin güneş ışınım emilimoranı sistemin verimlilik performansını etkileyen bir parametre olarak düşünülebilir.

Dış kenar yüksekliği ve zemin sıcaklık değişiminin güneş bacası sistemi üzerinde etkisinin deneysel olarak incelenmesi

A solar chimney system was established in Adıyaman University campus area designing a special layeredsoil (27 m diameter and 0.5 m deep drop-circular hole, while the aluminum foil, glass wool, sand, gravel, brokenglass trotters windscreen and its top surface, asphalt) on the 0.004 m thick glass laying the panels, 17 m height of 0.8m in diameter chimney and a height adjustable air inlet collector (periphery) from 0.05 to 0.35 m to investigate theeffect of environmental temperature, chimney height, the collector diameter, the value of solar radiation etc on theperformance or effectiveness of Solar Chimney (SCS). In this study, on July 22 on 13:00, temperature, air velocityand temperature under collector at point C2 for different heights (0.05 – 0.35 m) for air inlet portion of collector(periphery) and of special prepared ground floor according to weather conditions (solar radiation, ambienttemperature, air velocity) is investigated. Moreover, temperature of ambient, under collector, glass surface and groundunder collector along the day with two hours interval and ambient air velocity, temperature and air velocity at pointC2 where turbine is assembled is investigated. Measurements made in the collector air inlet height is now long solarchimney performance dropped the most ideal height 0.05 m, the specific configuration of the ground daily solarradiation and ambient temperature proportional to a heat store and heat it to the night collector environment by givingthe system performance increase was observed. Solar chimney 'of the ground under the collector of solar radiationabsorption rates to the performance of the system efficiency can be considered as a parameter. It is observed in themeasurements that as long as the collector air inlet height increases, solar chimney performance dropped and the mostideal height becomes 0.05 m. Also, the specific configuration of the ground daily solar radiation and ambienttemperature proportional store heat and it increases the performance of the system by giving this heat to the collectorenvironment in evening. Solar radiation absorption rate of ground under the collector in solar chimney should beconsidered as a parameter that affects efficiency performance of the system.

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