Analytical model for convection-conduction heat transfer during water injection in fractured geothermal reservoirs with variable rock matrix block size

Geothermics ◽  
2017 ◽  
Vol 69 ◽  
pp. 1-14 ◽  
Author(s):  
Mahdi Abbasi ◽  
Nastaran Khazali ◽  
Mohammad Sharifi
Keyword(s):  
Heat Transfer ◽  
Analytical Model ◽  
Water Injection ◽  
Block Size ◽  
Rock Matrix ◽  
Conduction Heat Transfer ◽  
Geothermal Reservoirs ◽  
Matrix Block

Analytical model for heat transfer between vertical fractures in fractured geothermal reservoirs during water injection

2019 ◽  
Vol 130 ◽  
pp. 73-86 ◽  
Author(s):  
Mahdi Abbasi ◽  
Mehrshad Mansouri ◽  
Amin Daryasafar ◽  
Mohammad Sharifi
Keyword(s):  
Heat Transfer ◽  
Analytical Model ◽  
Water Injection ◽  
Geothermal Reservoirs ◽  
Vertical Fractures

An exact analytical model for fluid flow through finite rock matrix block with special saturation function

2019 ◽  
Vol 577 ◽  
pp. 123905
Author(s):  
Mojtaba Izadmehr ◽  
Mahdi Abbasi ◽  
Mohammad Hossein Ghazanfari ◽  
Mohammad Sharifi ◽  
Alireza Kazemi
Keyword(s):  
Fluid Flow ◽  
Analytical Model ◽  
Rock Matrix ◽  
Saturation Function ◽  
Matrix Block ◽  
Flow Through

scholarly journals An Experimental Investigation of Water Vapor Condensation from Biofuel Flue Gas in a Model of Condenser, (1) Base Case: Local Heat Transfer without Water Injection

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 844
Author(s):  
Robertas Poškas ◽  
Arūnas Sirvydas ◽  
Vladislavas Kulkovas ◽  
Povilas Poškas
Keyword(s):  
Heat Transfer ◽  
Water Vapor ◽  
Flue Gas ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Water Injection ◽  
Vapor Condensation ◽  
Base Case ◽  
Water Vapor Condensation ◽  
Condensing Heat Exchanger

Waste heat recovery from flue gas based on water vapor condensation is an important issue as the waste heat recovery significantly increases the efficiency of the thermal power units. General principles for designing of this type of heat exchangers are known rather well; however, investigations of the local characteristics necessary for the optimization of those heat exchangers are very limited. Investigations of water vapor condensation from biofuel flue gas in the model of a vertical condensing heat exchanger were performed without and with water injection into a calorimetric tube. During the base-case investigations, no water was injected into the calorimetric tube. The results showed that the humidity and the temperature of inlet flue gas have a significant effect on the local and average heat transfer. For some regimes, the initial part of the condensing heat exchanger was not effective in terms of heat transfer because there the flue gas was cooled by convection until its temperature reached the dew point temperature. The results also showed that, at higher Reynolds numbers, there was an increase in the length of the convection prevailing region. After that region, a sudden increase was observed in heat transfer due to water vapor condensation.

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