Numerical Estimation of Heat Recovery within a Distributed Incinerator Using Water and Hydrocarbons as Working Fluids
International Journal of Mechanical Engineering and Applications
Volume 7, Issue 1, February 2019, Pages: 8-16
Received: Jan. 7, 2019;
Accepted: Mar. 13, 2019;
Published: Apr. 3, 2019
Views 130 Downloads 87
Hikaru Yamashiro, National Institute of Technology, OKINAWA College, Nago, Japan
Tomoyasu Yara, National Institute of Technology, OKINAWA College, Nago, Japan
Kenji Fukutomi, THOMAS Technical Research Company, Uruma, Japan
The potential of a cogeneration system combined with a small combustion furnace was investigated in this study. The heat transfer between the exhaust gas and working fluid flowing in a spiral tube heat exchanger was estimated numerically and the amount of vapor generated was predicted. The combustion chamber had a 0.49 m3 inside volume with a chimney height of 2.5 m and an inner diameter of 0.28 m. A uniform gas side temperature condition that was referenced from the results of a preliminary experiment and a computational fluid dynamics simulation were adopted to simplify calculations and clarify the effects of working fluids. The amounts of heat recovery when utilizing water and other types of working fluids (Pentane, Butane) were compared. The most effective tube length considering pressure drop and phase change was also predicted. Isentropic theoretical thermal efficiency and T-s diagrams are analyzed to evaluate the vapor-power conversion rate using waste heat. As a result, a potential the heat recovery rate of approximately 100 kW at a 150 kg/h mass flow rate is expected.
Numerical Estimation of Heat Recovery within a Distributed Incinerator Using Water and Hydrocarbons as Working Fluids, International Journal of Mechanical Engineering and Applications.
Vol. 7, No. 1,
2019, pp. 8-16.
Takuma Co., Ltd., Environmental Technology Research Association, “Waste Incineration Technology”, Ohm-Sha, 2010, pp. 1-200.
The Japan Society of Mechanical Engineers, Heat Transfer Data Book 5 th ed., 2009, pp. 105-204.
The Japan Society of Refrigerating and Air Conditioning Engineers, Refrigeration, Special ed., Vol. 090, No. 1047, 2015, pp. 3-22.
R. Echigo, K. Hanamura, Y. Takahashi, M. Okuyama, S. Jugjai, A. Hagiwara, Y. Usami and N. Funahashi, “Heat transfer analysis for a tubular methane-steam reformer with a porous radiative converter”, Transactions of the Japan Society of Mechanical Engineers, Series B, Vol. 57, No. 539, 1991, pp. 163-169.
J. Yamashita and Y. Utaka, “On prediction of heat exchanger performance for latent heat recovery using flue gas”, Transactions of the Japan Society of Mechanical Engineers, Series B, Vol. 80, No. 818, 2014, pp. 1-14.
A. S. Hegazy, “Possible waste heat recovery in the condenser of a regenerative steam cycle”, Journal of Thermal Science and Technology, Vol. 2, No. 1, 2007, pp. 1-12.
H. Takamatsu, H. Yamashiro, N. Takata, H. Honda, “Vapor absorption by LiBr aqueous solution in vertical smooth tubes”, International Journal of Refrigeration, Vol. 26, 2003, pp. 659-666.
Le Minh Nhut, Young-Sub Moon, Youn Cheol Park, “A study on energy optimization of heat exchanger in a gasification system”, International Journal of Mechanical Engineering and Applications, Vol. 4, No. 3, 2016, pp. 123-129.
H. Hasegawa and S. Kimishima, “An investigation on working fluid selection of Rankine-Cycle driven by low grade heat with small temperature difference to environment”, Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, Vol. 30, No. 1, 2013, pp. 1-12.
P. A. Kew and K. Cornwell, “Development of a highly compact steam generator”, Applied Thermal Engineering, Vol. 25, 2005, pp. 2604-2614.
S. Tokuda and T. Osanai, “Exergie-Heat recovery analysis for exhaust gas in the boiler system”, Transactions of the Japan Society of Mechanical Engineers, Series B, Vol. 50, No. 449, 1984, pp. 91-97.
Xin, Z. Rao, X. You, Z. Song, D. Han, “Numerical investigation of vapor–liquid heat and mass transfer in porous media”, Energy Conversion and Management, Vol. 78, 2014, pp. 1-7.
Fei He, J. Wang, “Numerical investigation on critical heat flux and coolant”, Energy Conversion and Management, Vol. 80, 2014, pp. 591-597.
O. R. Alomar, M. A. A. Mendes, D. Trimis, S. Ray, “Numerical simulation of complete liquid-vapour phase change process inside porous media using smoothing of diffusion coefficient”, International Journal of Thermal Sciences, Vol. 86, 2014, pp. 408-420.
O. R. Alomar, M. A. A. Mendes, S. Ray, D. Trimis, “Numerical investigation of complete evaporation process inside porous media using staggered and non-staggered grid arrangements”, International Journal of Thermal Sciences, Vol. 129, 2018, pp.56-72.
O. R. Alomar, R. R. Mohammed, M. A. A. Mendes, S. Ray, D. Trimis, “Numerical investigation of two-phase flow in anisotropic porous evaporator”, International Journal of Thermal Sciences, Vol. 135, 2019, pp. 1-16.
Lemmon, E. W., Huber, M. L. and Mc Linden, M. O., NIST REFPROP Ver.9 (2010).