Using Hybrid System of Ground Heat Exchanger and Evaporative Cooler in Arid Weather Condition
In this paper, the feasibility study of using a hybrid
system of ground heat exchangers (GHE) and direct evaporative
cooling system in arid weather condition has been performed. The
model is applied for Yazd and Kerman, two cities with arid weather
condition in Iran. The system composed of three sections: Ground-
Coupled-Circuit (GCC), Direct Evaporative Cooler (DEC) and
Cooling Coil Unite (CCU). The GCC provides the necessary precooling
for DEC. The GCC includes four vertical GHE which are
designed in series configuration. Simulation results show that
hybridization of GCC and DEC could provide comfort condition
whereas DEC alone did not. Based on the results the cooling
effectiveness of a hybrid system is more than unity. Thus, this novel
hybrid system could decrease the air temperature below the ambient
wet-bulb temperature. This environmentally clean and energy
efficient system can be considered as an alternative to the mechanical
vapor compression systems.
[1] V.C Mei, C.J Emerson, New approach for analysis of ground-coil design
for applied heat pump system, ASHRAE Transaction 1985; 91: 1216-
24.
[2] N.K Muraya, D.L O-Neal, W.M Heffington Thermal interference of
adjacent legs in vertical U-tube heat exchanger for a ground-coupled
heat pump. ASHRAE Transaction 1996; 102: 12-21.
[3] S.P Rottmayer, W.A Beckman, J.W Mitchell. Simulation of a single
vertical U-tube ground heat exchanger in an infinite medium. ASHRAE
Transaction 1997; 103: 651-59.
[4] P. Cui, H. Yang, Z. Fang, Numerical analysis and experimental
validation of heat transfer in ground heat exchangers in alternative
operation modes. Energy and Buildings 2008; 40: 1060-66.
[5] C.K Lee, H.N Lam, Computer simulation of borehole ground heat
exchangers for geothermal heat pump systems. Renewable Energy 2008;
33: 1286-96.
[6] Z. Li, M. Zheng, Development of a numerical model for the simulation
of vertical U-tube ground heat exchangers. Applied Thermal
Engineering 2009; 29: 920-24.
[7] C. Yavuzturk, Modeling of Vertical Ground Loop Heat Exchangers for
Ground Source Heat Pump Systems. Doctoral thesis, Oklahoma State
University; 1999.
[8] A. Gasparella, G.A Longo, R. Marra, Combination of ground source
heat pumps with chemical dehumidification of air. Applied Thermal
Engineering 2005; 25 (2-3): 295-308.
[9] O. Ozgener, A. Hepbasli, An economical analysis on a solar greenhouse
integrated solar assisted geothermal heat pump system. Journal of
Energy Resources Technology 2006; 128(1): 28-34.
[10] A.D Chiasson, C. Yavuzturk, Assessment of the viability of hybrid
geothermal heat pump systems with solar thermal collectors. ASHRAE
Transactions 2003; 109 (2): 487-500.
[11] C.K Lee, H.N Lam, Computer simulation of ground-coupled liquid
desiccant air conditioner for sub-tropical regions, International Journal
of Thermal Sciences 2009; 48: 2365-74.
[12] G. Heidarinejad, M. Bozorgmehr, S. Delfani, J. Esmaeelian,
Experimental investigation of two-stage indirect/direct evaporative
cooling system in various climatic conditions. Building and
Environment 2009; 44: 2073-79.
[13] G. Heidarinejad, V. Khalajzadeh, S. Delfani, Performance analysis of a
ground assisted direct evaporative cooling air conditioner, Building and
Environment 45 (10) (2010) 2327-2335..
[14] G Heidarinejad, M Heidarinejad, S. Delfani, J. Esmaeelian, Feasibility
of using various kinds of cooling systems in a multi-climates country.
Energy and Buildings 2008; 40: 1946-53
[15] T. Kusuda, P.R Archenbach, Earth temperature and thermal diffusivity
at selected stations in the United States, ASHRAE Transaction 1965;
71(1):61-74.
[16] S.K Wang, Handbook of air conditioning and refrigeration, Second
edition, McGraw-Hill; 2001
[17] P.W Dittus, L.M.K Boelter, Heat transfer in automobile radiators of the
tubular type. Heat Mass Transfer 1985; 12: 3-22.
[18] A.A Zukauskas, Heat transfer from tubes in cross Flow. Adv. Heat
Transfer; 1972; 8: 93-160.
[19] A. Bejan, Heat Transfer, Wiley; 1993.
[20] J.A Dowdy, N.S Karabash, Experimental determination of heat and mass
transfer coefficients in rigid impregnated cellulose evaporative media.
ASHRAE Transaction 1987; 93 (Part 2): 382-395.
[1] V.C Mei, C.J Emerson, New approach for analysis of ground-coil design
for applied heat pump system, ASHRAE Transaction 1985; 91: 1216-
24.
[2] N.K Muraya, D.L O-Neal, W.M Heffington Thermal interference of
adjacent legs in vertical U-tube heat exchanger for a ground-coupled
heat pump. ASHRAE Transaction 1996; 102: 12-21.
[3] S.P Rottmayer, W.A Beckman, J.W Mitchell. Simulation of a single
vertical U-tube ground heat exchanger in an infinite medium. ASHRAE
Transaction 1997; 103: 651-59.
[4] P. Cui, H. Yang, Z. Fang, Numerical analysis and experimental
validation of heat transfer in ground heat exchangers in alternative
operation modes. Energy and Buildings 2008; 40: 1060-66.
[5] C.K Lee, H.N Lam, Computer simulation of borehole ground heat
exchangers for geothermal heat pump systems. Renewable Energy 2008;
33: 1286-96.
[6] Z. Li, M. Zheng, Development of a numerical model for the simulation
of vertical U-tube ground heat exchangers. Applied Thermal
Engineering 2009; 29: 920-24.
[7] C. Yavuzturk, Modeling of Vertical Ground Loop Heat Exchangers for
Ground Source Heat Pump Systems. Doctoral thesis, Oklahoma State
University; 1999.
[8] A. Gasparella, G.A Longo, R. Marra, Combination of ground source
heat pumps with chemical dehumidification of air. Applied Thermal
Engineering 2005; 25 (2-3): 295-308.
[9] O. Ozgener, A. Hepbasli, An economical analysis on a solar greenhouse
integrated solar assisted geothermal heat pump system. Journal of
Energy Resources Technology 2006; 128(1): 28-34.
[10] A.D Chiasson, C. Yavuzturk, Assessment of the viability of hybrid
geothermal heat pump systems with solar thermal collectors. ASHRAE
Transactions 2003; 109 (2): 487-500.
[11] C.K Lee, H.N Lam, Computer simulation of ground-coupled liquid
desiccant air conditioner for sub-tropical regions, International Journal
of Thermal Sciences 2009; 48: 2365-74.
[12] G. Heidarinejad, M. Bozorgmehr, S. Delfani, J. Esmaeelian,
Experimental investigation of two-stage indirect/direct evaporative
cooling system in various climatic conditions. Building and
Environment 2009; 44: 2073-79.
[13] G. Heidarinejad, V. Khalajzadeh, S. Delfani, Performance analysis of a
ground assisted direct evaporative cooling air conditioner, Building and
Environment 45 (10) (2010) 2327-2335..
[14] G Heidarinejad, M Heidarinejad, S. Delfani, J. Esmaeelian, Feasibility
of using various kinds of cooling systems in a multi-climates country.
Energy and Buildings 2008; 40: 1946-53
[15] T. Kusuda, P.R Archenbach, Earth temperature and thermal diffusivity
at selected stations in the United States, ASHRAE Transaction 1965;
71(1):61-74.
[16] S.K Wang, Handbook of air conditioning and refrigeration, Second
edition, McGraw-Hill; 2001
[17] P.W Dittus, L.M.K Boelter, Heat transfer in automobile radiators of the
tubular type. Heat Mass Transfer 1985; 12: 3-22.
[18] A.A Zukauskas, Heat transfer from tubes in cross Flow. Adv. Heat
Transfer; 1972; 8: 93-160.
[19] A. Bejan, Heat Transfer, Wiley; 1993.
[20] J.A Dowdy, N.S Karabash, Experimental determination of heat and mass
transfer coefficients in rigid impregnated cellulose evaporative media.
ASHRAE Transaction 1987; 93 (Part 2): 382-395.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:58858", author = "Vahid Khalajzadeh and Ghassem Heidarinejad", title = "Using Hybrid System of Ground Heat Exchanger and Evaporative Cooler in Arid Weather Condition", abstract = "In this paper, the feasibility study of using a hybrid
system of ground heat exchangers (GHE) and direct evaporative
cooling system in arid weather condition has been performed. The
model is applied for Yazd and Kerman, two cities with arid weather
condition in Iran. The system composed of three sections: Ground-
Coupled-Circuit (GCC), Direct Evaporative Cooler (DEC) and
Cooling Coil Unite (CCU). The GCC provides the necessary precooling
for DEC. The GCC includes four vertical GHE which are
designed in series configuration. Simulation results show that
hybridization of GCC and DEC could provide comfort condition
whereas DEC alone did not. Based on the results the cooling
effectiveness of a hybrid system is more than unity. Thus, this novel
hybrid system could decrease the air temperature below the ambient
wet-bulb temperature. This environmentally clean and energy
efficient system can be considered as an alternative to the mechanical
vapor compression systems.", keywords = "Computational Fluid Dynamics (CFD), Cooling CoilUnit (CCU), Direct Evaporative Cooling (DEC), Ground CoupledCircuit (GCC)", volume = "5", number = "8", pages = "1616-6", }
