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نام کاربری یا پست الکترونیکی
رمز عبور

enerjy 1

Abstract:

A model for time dependent analysis of solar chimneys is presented. The energy balance equations for three components of solar chimneys, absorbing plate, cover glass and air-gap are discretized with respect to time using an implicit finite difference model. The discretized nonlinear energy balance equations are solved for numerous time steps over a 24-h period using the Newton–Raphson method. The time dependent solar irradiation is determined using the clear sky model. The model’s performances for var-ious parameters of solar chimney that affect the thermal mass of the absorbing plate are tested. It was determined that a solar chimney with a relatively large thermal-mass produces airflow well into night and early morning when no solar irradiance is present. Also, a high thermal mass of the absorbing plate results in smaller variations in the airflow rate. The results of the present model for a solar chimney with no thermal storage compare well with the previously published data.

Authors:

Mohammad H. Naraghi , Sylvain Blanchard

Keywords:

Solar chimney

Modeling

Passive use of solar energy in buildings

Natural ventilation

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تعداد کل اعضای کنسرسیوم : 1507

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logo Twenty-four hour simulation of solar chimneys 

حامیان کنسرسیوم ایرکاس

  • IRSME
  • RKA
  • ACS
  • IUE
  • RFTC
  • BQC
  • DNW
  • ICS
  • TUV-EMB
  • QAL
  • Ino
  • Allaiance
  • Tckit

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