vol25no3pa8

TJES: Abbas EF, Azat SA. The impact of width of the air gap channel on the mass flow rate, Rayleigh number, and efficiency of passive solar heating system. Tikrit Journal of Engineering Sciences 2018; 25 (3): 47-52.
APA: Abbas, E. F., & Azat, S. A. (2018). The impact of width of the air gap channel on the mass flow rate, Rayleigh number, and efficiency of passive solar heating system. Tikrit Journal of Engineering Sciences, 25(3), 47-52.

References

[1] Mazria E. Passive solar energy book; 1979.
[2] Duffie JA, Beckman WA. Solar engineering of thermal processes: John Wiley & Sons; 2013.
[3] Williams RJ. Passive solar heating. Ahn Arbor Science; 1983.
[4] Akbari H, Borgers T. Free convective laminar flow within the Trombe wall channel. California Univers-ity, Berkeley (USA). Lawrence Berkeley Lab.; 1978: pp 165-174.
[5] Akbarzadeh A, Charters W, Lesslie D. Thermocir-culation characteristics of a Trombe wall passive test cell. Solar Energy 1982; 28 (6): 461-468.
[6] Borgers T. Free convective turbulent flow within the trombe wall channel. 1979: pp. 253-264.

Tikrit Journal of Engineering Sciences (2018) 25(3) 47- 52

The Impact of Width of the Air Gap Channel on the Mass Flow Rate, Rayleigh Number, and Efficiency of Passive Solar Heating System

Ehsan F. Abbas Shayma A. Azat
Technical Coll./ Kirkuk, Northern Technical University, Iraq

Abstract

The mass flow rate and Rayleigh number has been investigated experimentally on the passive solar using Trombe wall consist of (industrial wax) used as phase change material (PCM). A test rig of a cubicle was made of PVC sandwich panel except the south wall, Trombe wall; covered with a clear glass of 6 mm thickness. The six experiments were carried out during the winter season in Kirkuk city with six different widths of the air gap channel (10, 15, 20, 25, 30, and 35) cm. The experimental resultts show that the mass flow rate proportional directly to a width of the channel and inversely with Rayleigh number. Moreover, the highest efficiency was obtained at a depth of 30 cm, where it was about 2.45 times the efficiency of 10 cm.

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Keywords: Phase change material, Trombe wall, mass flow rate.

How to cite

TJES: Abbas EF, Azat SA. The impact of width of the air gap channel on the mass flow rate, Rayleigh number, and efficiency of passive solar heating system. Tikrit Journal of Engineering Sciences 2018; 25 (3): 47-52.
APA: Abbas, E. F., & Azat, S. A. (2018). The impact of width of the air gap channel on the mass flow rate, Rayleigh number, and efficiency of passive solar heating system. Tikrit Journal of Engineering Sciences, 25(3), 47-52.