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RISS 인기검색어
- 검색키워드
- 저자 : Dabbas, R. K. (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Achievement of geothermal energy using ground heat exchanger in Ma’en
Mohammed Awwad Ali Al-Dabbas 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.8
Geothermal energy in Jordan is a low-emission and renewable source that could provide households and commercial buildings with heating and cooling. Access to this 'free' energy may be available just a few feet underground. Thus, the objectives of this research are designing a ground heat exchanger that utilizes geothermal energy in heating to exchange the primary geothermal fluid with a secondary clean fluid, determining the feasibility of designing a ground heat exchanger system to pump geothermal energy under the weather conditions of the Ma`en area in Jordan and calculating the amount of energy saved. The design procedure involves applying energy and momentum equations around the geothermal fluid circuit. The FLUENT software program is used to calculate the ground heat exchanger parameters and the amount of energy saved. Finally, the feasibility study shows that the Geoexchange systems represent a savings to homeowners of around 70% in the heating mode, and up to 50% in the cooling mode compared to conventional fossil fuel systems.
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Inhibitory Effect of Solid Inhibitors on LPG Combustible Mixtures
Hamdan, M. A.,Yamin, J. A.,Dabbas, R. K. Korean Chemical Society 2010 대한화학회지 Vol.54 No.3
액화석유가스-공기 불꽃에 대한 2가지 열적 금지제(즉, 돌가루, 탄산칼슘)의 억제효과를 연구하였다. 이를 위해 이들 금지제를 가하기 전과 후 가연성 혼합물의 가연성 한도를 측정하여 조사하였다. 그 결과, 탄산칼슘이 돌가루에 비해 억제 효과가 우수하였다. An experimental rig was constructed in order to study the inhibitory effects of two thermal inhibitors namely; stone and calcium carbonate, on Liquefied Petroleum Gas -air flames. This was achieved by measuring the flammability limits of the combustible mixtures before and after the addition of these inhibitors. It was found that calcium carbonate has superior inhibitory effect on the combustible mixture under investigation while, Stone has a lower inhibitory effect than that of calcium carbonate.
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