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אסיף מאגר המחקר החקלאי
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Energy saving in agricultural buildings: Heating or mixing?
Year:
1997
Authors :
Tanny, Josef
;
.
Teitel, Meir
;
.
Volume :
3
Co-Authors:
Tanny, Josef, Cent for Technological Education, Holon, Holon, Israel
Teitel, Meir, Cent for Technological Education, Holon, Holon, Israel
Facilitators :
From page:
To page:
(
Total pages:
1
)
Abstract:
When a closed space like a broiler budding or a greenhouse is heated, thermal stratification can be established. This stratification is usually undesirable since part of the heating energy is wasted in the unnecessary but unavoidable heating of the upper region. Therefore the temperature near the bottom has to be further raised to reach the desired level. 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 way in an attempt to indicate the more economical one. The results of a theoretical one-dimensional model show that 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.
Note:
Related Files :
energy efficiency
farm buildings
greenhouses
heating
Surplus heating
Temperature distribution
thermal stratification
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Conference paper
;
.
Language:
English
Editors' remarks:
ID:
28798
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:42
Scientific Publication
Energy saving in agricultural buildings: Heating or mixing?
3
Tanny, Josef, Cent for Technological Education, Holon, Holon, Israel
Teitel, Meir, Cent for Technological Education, Holon, Holon, Israel
Energy saving in agricultural buildings: Heating or mixing?
When a closed space like a broiler budding or a greenhouse is heated, thermal stratification can be established. This stratification is usually undesirable since part of the heating energy is wasted in the unnecessary but unavoidable heating of the upper region. Therefore the temperature near the bottom has to be further raised to reach the desired level. 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 way in an attempt to indicate the more economical one. The results of a theoretical one-dimensional model show that 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.
Scientific Publication
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