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Efficient utilization of energy in buildings and ponds
Year:
1998
Source of publication :
Applied Thermal Engineering
Authors :
Tanny, Josef
;
.
Teitel, Meir
;
.
Volume :
18
Co-Authors:
Tanny, J., Center for Technological Education Holon, P.O.B. 305, Holon 58102, Israel
Teitel, M., Aggricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet-Dagan 50250, Israel
Facilitators :
From page:
1111
To page:
1119
(
Total pages:
9
)
Abstract:
Thermal stratification is often established in heated buildings and ponds. In such cases, the temperature at the bottom is lower than that near the top, resulting in an inconvenient microclimate at the lower region. Thus, it is usually desired to further raise the temperature near the bottom. This can be done in two ways. The first is by providing a surplus of heat without destroying the thermal stratification, and the second is by mixing mechanically the medium (while heating) to establish a uniform temperature distribution and hence, to raise the bottom temperature. The objective of this study is to calculate the energy required by each method in an attempt to determine the one which is more economical. A theoretical one-dimensional (1D) model is developed to calculate the energy required by each method and the ratio between them. The model considers enclosures with inclined or vertical side walls. For typical conditions in buildings and ponds, the ratio between the energies of mixing and surplus heating is very small, indicating that mixing is much more economical in raising the temperature of the lower region of the heated enclosure. For the case of inclined side walls, it is shown that the ratio between the energies required for mixing and heating increases with the inclination angle. © 1998 Elsevier Science Ltd. All rights reserved.
Note:
Related Files :
Buildings
energy conservation
Energy saving
Energy utilization
heating
Ponds
Space heating,Energy saving
thermal stratification
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30385
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:54
Scientific Publication
Efficient utilization of energy in buildings and ponds
18
Tanny, J., Center for Technological Education Holon, P.O.B. 305, Holon 58102, Israel
Teitel, M., Aggricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet-Dagan 50250, Israel
Efficient utilization of energy in buildings and ponds
Thermal stratification is often established in heated buildings and ponds. In such cases, the temperature at the bottom is lower than that near the top, resulting in an inconvenient microclimate at the lower region. Thus, it is usually desired to further raise the temperature near the bottom. This can be done in two ways. The first is by providing a surplus of heat without destroying the thermal stratification, and the second is by mixing mechanically the medium (while heating) to establish a uniform temperature distribution and hence, to raise the bottom temperature. The objective of this study is to calculate the energy required by each method in an attempt to determine the one which is more economical. A theoretical one-dimensional (1D) model is developed to calculate the energy required by each method and the ratio between them. The model considers enclosures with inclined or vertical side walls. For typical conditions in buildings and ponds, the ratio between the energies of mixing and surplus heating is very small, indicating that mixing is much more economical in raising the temperature of the lower region of the heated enclosure. For the case of inclined side walls, it is shown that the ratio between the energies required for mixing and heating increases with the inclination angle. © 1998 Elsevier Science Ltd. All rights reserved.
Scientific Publication
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