A study of solar chimney assisted wind tower system for natural ventilation in buildings

✍ Scribed by N.K. Bansal; Rajesh Mathur; M.S. Bhandari

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 355 KB
• Volume: 29
• Category: Article
• ISSN: 0360-1323
• DOI: 10.1016/0360-1323(94)90008-6

✦ Synopsis

The concept of a solar chimney coupled with a wind tower to induce natural ventilation has been studied analytically in this paper. It is estimated that the effect of a solar chimney is relatively • much higher lor lower wind speeds. For ambient wind speed o[' 1.0 m/s,.for example, the wind tower alone creates a mass flotr rate ~?f0.75 kg/s only. while the solar chinmey assisted system is able to create an airflow up to 1.4 kg/s at 700 W,'m'-incident solar ra~fiation. NOMENCLATURE A area (m 2) C pressure loss coefficient 9 acceleration due to gravity (m/s 2) h stack height (m)h I heat transfer coefficient (W/m 2 ~C) K coefficient of discharge m mass flow rate (kg/sec) e pressure (N/m z) Q volume flow rate (m3/sec) S(t) average solar radiation (W/m 2) T temperature (°C) U heat loss coefficient (W/m 2 "~' C) W width (m) X pressure coefficient Z constant Greek absorptance /~ slope (°) z transmittance p density (kg/m 3) Subscripts a ambient b bottom C chimney D discharge f fluid i room inlet I tower inlet L losses O outlet p plate r ratio R room W aeromotive