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Full-Text Articles in Engineering
Estimation Of The Entropy Of Vaporization At The Normal Boiling Point For Azeotropic Mixtures Containing Water, Alcohol Or Acetic Acid, Yasar Demirel
Estimation Of The Entropy Of Vaporization At The Normal Boiling Point For Azeotropic Mixtures Containing Water, Alcohol Or Acetic Acid, Yasar Demirel
YASAR DEMIREL
The entropy of vaporization at the normal boiling point has been estimated for binary and ternary azotropic mixtures containing water, alcohol or acetic acid. For this purpose, the Lee±Kesler correlation, developed originally for pure substances, is used with the appropriate mixing rules to estimate the heat of vaporization of the mixtures. Estimations for the entropy of vaporization of the 97 binary and 78 ternary mixtures are expressed as function of the ratio of the normal boiling point to average molecular weight. These expressions predict the entropy of vaporization satisfactorily, with less than 5% average deviation.
Entropy Generation In A Rectangular Packed Duct With Wall Heat Flux, Yasar Demirel, R. Kahraman
Entropy Generation In A Rectangular Packed Duct With Wall Heat Flux, Yasar Demirel, R. Kahraman
YASAR DEMIREL
The entropy generation due to heat transfer and friction has been calculated for fully developed, forced convection flow in a large rectangular duct. packed with spherical particles, with constant heat fluxes applied to both the top (heated) and bottom (cooled) wall. An approximate analytical expression for the velocity profile developed for packed bed with H/dp > 5 has been used together \vith the energy equation of fully developed flow to calculate the nonisothermal temperature profiles along the flow passage. The velocity prolile takes into account the increase in the velocity near the wall due to the higher voidage in this region …
Estimation Of The Entropy Of Vaporization At The Normal, Yasar Demirel
Estimation Of The Entropy Of Vaporization At The Normal, Yasar Demirel
YASAR DEMIREL
The entropy of vaporization at the normal boiling point has been estimated for binary and ternary azotropic mixtures containing water, alcohol or acetic acid. For this purpose, the Lee±Kesler correlation, developed originally for pure substances, is used with the appropriate mixing rules to estimate the heat of vaporization of the mixtures. Estimations for the entropy of vaporization of the 97 binary and 78 ternary mixtures are expressed as function of the ratio of the normal boiling point to average molecular weight. These expressions predict the entropy of vaporization satisfactorily, with less than 5% average deviation
Entropy Generation In A Rectangular Packed Duct With Wall, Yasar Demirel, R. Kahraman
Entropy Generation In A Rectangular Packed Duct With Wall, Yasar Demirel, R. Kahraman
YASAR DEMIREL
The entropy generation due to heat transfer and friction has been calculated for fully developed forced convection flow in a large rectangular duct packed with spherical particles with constant heat fluxes applied to both the top heated and bottom cooled wall.
Energetic And Exergetic Efficiency Of Latent Heat Storage System For Greenhouse Heating, Yasar Demirel, A Bascetincelik, Hh. Ozturk, H.O. Paksoy
Energetic And Exergetic Efficiency Of Latent Heat Storage System For Greenhouse Heating, Yasar Demirel, A Bascetincelik, Hh. Ozturk, H.O. Paksoy
YASAR DEMIREL
In this research, solar energy has been stored using the paraffin with the latent heat technique for heating the plastic greenhouse of 180 m2.
Packing Size Anetric Heating, Yasar Demirel, B.A. Abu Al-Saud, H.H. Ali, Y. Makkawi
Packing Size Anetric Heating, Yasar Demirel, B.A. Abu Al-Saud, H.H. Ali, Y. Makkawi
YASAR DEMIREL
An experimental and numerical investigation of fully developed forced convection in large rectangular packed ducts is presented. The horizontally oriented ducts have the length-to-separation distance ratio of L/H=16 with two aspect ratios of W/H=8 and 4. A constant heat flux is supplied to the top wall, while the bottom and side walls are insulated. Packing of hard polyvinyl chloride Raschig rings with outside diameters of 48 and 34 mm, and expanded polystyrene spheres with diameters of 48, 38 and 29 mm are used in the air flow passage. The pressure drop, the heat flux, axial and transverse temperature profiles of …
Enhancement Of Convection Heat-Transfer, Yasar Demirel, H.H. Al-Ali, B.A. Abu-Al-Saud
Enhancement Of Convection Heat-Transfer, Yasar Demirel, H.H. Al-Ali, B.A. Abu-Al-Saud
YASAR DEMIREL
Characteristics of wall-to-air heat transfer for a fully developed forced convection have been studied in a large rectangular packed duct with 160 cm heated length, 40 cm width, and for low bed equivalent diameter to particle diameter ratio. The separation distance between the top and bottom walls is 10 cm. A uniform heat ¯ux is supplied at the top wall, while the bottom wall is insulated. Raschig rings in two and spherical packing in three sizes have been used in the air ¯ow passage to investigate the enhancement of heat transfer due to packing. Temperature pro®les for the steady and …
Irreversibility Profiles In A Circular Couette Flow Of Temperature Dependent Materials, Yasar Demirel
Irreversibility Profiles In A Circular Couette Flow Of Temperature Dependent Materials, Yasar Demirel
YASAR DEMIREL
The irreversibility distributions have been calculated for a circular Couette flow of ethylene glycol with temperature dependent thermal conductivity and viscosity. The approximate series solutions of velocity and temperature fields are used to obtain the gradients to calculate the spatial entropy generation rate with narrowing gap of the Couette. It was found that the irreversibility distribution is relatively more uniform for a narrow-gap Couette.