Spatial distribution of air temperature as a measure of ventilation efficiency in large uninsulated cowshed
Ventilation in the building is to assure a microclimate suitable for humans and animals as well as the durability of structures. Based on the data from literature theoretical heat and moisture balancing ventilation rate calculations for uninsulated cowshed are presented. At an indoor temperature of...
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| Veröffentlicht in: | Building and environment 2008-06, Vol.43 (6), p.1016-1022 |
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| creator | Pajumägi, A. Poikalainen, V. Veermäe, I. Praks, J. |
| description | Ventilation in the building is to assure a microclimate suitable for humans and animals as well as the durability of structures. Based on the data from literature theoretical heat and moisture balancing ventilation rate calculations for uninsulated cowshed are presented. At an indoor temperature of −6.7
°C and indoor–outdoor temperature difference of 1
°C, the theoretical ventilation rate of 2300
m
3/h per cow is necessary to remove the water vapour produced by the cows from the building. At a difference of 2
°C the ventilation rate of 1200
m
3/h per cow and at 5
°C 530
m
3/h per cow is needed. But these calculated ventilation rates are probably unrealistic. Traditional methods are unreliable for uninsulated cowsheds and instead of that an alternative method for evaluating the ventilation rate is needed.
A good possibility to evaluate the ventilation is to study air distribution in the room, which is more qualitative than ventilation rate.
From the parameters of air distribution (air temperature, relative humidity and air velocity) air temperature is the most sensible indicator for ventilation.
The use of the spatial temperature distribution is proposed there as a measure to assess the ventilation's efficiency.
Standard deviation of indoor air temperature characterizes ventilation efficiency in the cowshed:
•
s⩽0.8—ventilation is good—mark 1;
•
s=0.9,…,1.3—ventilation is satisfactory (lack of animals in number or ventilation openings are too widely open; effect of chimney does not work)—mark 2;
•
s⩾1.4—ventilation is unsatisfactory (important ventilation openings are closed)—mark 3.
Complete closing of ridge vent has a sever impact on the ventilation and must be avoided. |
| doi_str_mv | 10.1016/j.buildenv.2007.02.015 |
| format | Article |
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°C and indoor–outdoor temperature difference of 1
°C, the theoretical ventilation rate of 2300
m
3/h per cow is necessary to remove the water vapour produced by the cows from the building. At a difference of 2
°C the ventilation rate of 1200
m
3/h per cow and at 5
°C 530
m
3/h per cow is needed. But these calculated ventilation rates are probably unrealistic. Traditional methods are unreliable for uninsulated cowsheds and instead of that an alternative method for evaluating the ventilation rate is needed.
A good possibility to evaluate the ventilation is to study air distribution in the room, which is more qualitative than ventilation rate.
From the parameters of air distribution (air temperature, relative humidity and air velocity) air temperature is the most sensible indicator for ventilation.
The use of the spatial temperature distribution is proposed there as a measure to assess the ventilation's efficiency.
Standard deviation of indoor air temperature characterizes ventilation efficiency in the cowshed:
•
s⩽0.8—ventilation is good—mark 1;
•
s=0.9,…,1.3—ventilation is satisfactory (lack of animals in number or ventilation openings are too widely open; effect of chimney does not work)—mark 2;
•
s⩾1.4—ventilation is unsatisfactory (important ventilation openings are closed)—mark 3.
Complete closing of ridge vent has a sever impact on the ventilation and must be avoided.</description><identifier>ISSN: 0360-1323</identifier><identifier>EISSN: 1873-684X</identifier><identifier>DOI: 10.1016/j.buildenv.2007.02.015</identifier><identifier>CODEN: BUENDB</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Air distribution ; Air temperature ; Air velocity ; Animals ; Applied sciences ; Building technical equipments ; Buildings ; Buildings. Public works ; Chimneys ; Computational efficiency ; Computing time ; Cowshed ; Durability ; Environmental engineering ; Estonia ; Exact sciences and technology ; Forestry ; Housing ; Indoor ; Life sciences ; Loose housing ; Mathematical analysis ; Moisture ; Relative humidity ; Rural ; Spatial distribution ; Standard deviation ; Temperature distribution ; Uninsulated ; Vapour ; Ventilation ; Ventilation. Air conditioning</subject><ispartof>Building and environment, 2008-06, Vol.43 (6), p.1016-1022</ispartof><rights>2007 Elsevier Ltd</rights><rights>2008 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c404t-c9a9c8ac0895dcbb7e8e165c694b4f2d32aceae6adfc52185e57d85dad1a2a113</citedby><cites>FETCH-LOGICAL-c404t-c9a9c8ac0895dcbb7e8e165c694b4f2d32aceae6adfc52185e57d85dad1a2a113</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.buildenv.2007.02.015$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20121429$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Pajumägi, A.</creatorcontrib><creatorcontrib>Poikalainen, V.</creatorcontrib><creatorcontrib>Veermäe, I.</creatorcontrib><creatorcontrib>Praks, J.</creatorcontrib><title>Spatial distribution of air temperature as a measure of ventilation efficiency in large uninsulated cowshed</title><title>Building and environment</title><description>Ventilation in the building is to assure a microclimate suitable for humans and animals as well as the durability of structures. Based on the data from literature theoretical heat and moisture balancing ventilation rate calculations for uninsulated cowshed are presented. At an indoor temperature of −6.7
°C and indoor–outdoor temperature difference of 1
°C, the theoretical ventilation rate of 2300
m
3/h per cow is necessary to remove the water vapour produced by the cows from the building. At a difference of 2
°C the ventilation rate of 1200
m
3/h per cow and at 5
°C 530
m
3/h per cow is needed. But these calculated ventilation rates are probably unrealistic. Traditional methods are unreliable for uninsulated cowsheds and instead of that an alternative method for evaluating the ventilation rate is needed.
A good possibility to evaluate the ventilation is to study air distribution in the room, which is more qualitative than ventilation rate.
From the parameters of air distribution (air temperature, relative humidity and air velocity) air temperature is the most sensible indicator for ventilation.
The use of the spatial temperature distribution is proposed there as a measure to assess the ventilation's efficiency.
Standard deviation of indoor air temperature characterizes ventilation efficiency in the cowshed:
•
s⩽0.8—ventilation is good—mark 1;
•
s=0.9,…,1.3—ventilation is satisfactory (lack of animals in number or ventilation openings are too widely open; effect of chimney does not work)—mark 2;
•
s⩾1.4—ventilation is unsatisfactory (important ventilation openings are closed)—mark 3.
Complete closing of ridge vent has a sever impact on the ventilation and must be avoided.</description><subject>Air distribution</subject><subject>Air temperature</subject><subject>Air velocity</subject><subject>Animals</subject><subject>Applied sciences</subject><subject>Building technical equipments</subject><subject>Buildings</subject><subject>Buildings. Public works</subject><subject>Chimneys</subject><subject>Computational efficiency</subject><subject>Computing time</subject><subject>Cowshed</subject><subject>Durability</subject><subject>Environmental engineering</subject><subject>Estonia</subject><subject>Exact sciences and technology</subject><subject>Forestry</subject><subject>Housing</subject><subject>Indoor</subject><subject>Life sciences</subject><subject>Loose housing</subject><subject>Mathematical analysis</subject><subject>Moisture</subject><subject>Relative humidity</subject><subject>Rural</subject><subject>Spatial distribution</subject><subject>Standard deviation</subject><subject>Temperature distribution</subject><subject>Uninsulated</subject><subject>Vapour</subject><subject>Ventilation</subject><subject>Ventilation. Air conditioning</subject><issn>0360-1323</issn><issn>1873-684X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNqFkU9r3DAQxUVpods0X6Hokt7sSLIl27eU0PyBQA5pITcxlsbtbL3yVpI35NvHm01yzWkY5vfmwXuMfZOilEKa03XZzzR6DLtSCdGUQpVC6g9sJdumKkxb339kK1EZUchKVZ_Zl5TWYhF2Vb1i_-62kAlG7inlSP2caQp8GjhQ5Bk3W4yQ54gcEge-QUj7ZbnvMGQa4RnHYSBHGNwjp8BHiH-Qz4FCmhcAPXfTQ_qL_iv7NMCY8PhlHrHfFz9_nV8VN7eX1-c_bgpXizoXroPOteBE22nv-r7BFqXRznR1Xw_KVwocAhrwg9NKthp141vtwUtQIGV1xL4f_m7j9H_GlO2GksNxhIDTnGylTKOF1u-CShjdNrpbQHMAXZxSijjYbaQNxEcrhd2XYNf2tQS7L8EKZZcSFuHJiwMkB-MQIThKb2olpJK12hucHThcctkRRpueA0VPEV22fqL3rJ4ABLekCA</recordid><startdate>20080601</startdate><enddate>20080601</enddate><creator>Pajumägi, A.</creator><creator>Poikalainen, V.</creator><creator>Veermäe, I.</creator><creator>Praks, J.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TV</scope><scope>7U6</scope><scope>C1K</scope><scope>7SU</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20080601</creationdate><title>Spatial distribution of air temperature as a measure of ventilation efficiency in large uninsulated cowshed</title><author>Pajumägi, A. ; Poikalainen, V. ; Veermäe, I. ; Praks, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c404t-c9a9c8ac0895dcbb7e8e165c694b4f2d32aceae6adfc52185e57d85dad1a2a113</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Air distribution</topic><topic>Air temperature</topic><topic>Air velocity</topic><topic>Animals</topic><topic>Applied sciences</topic><topic>Building technical equipments</topic><topic>Buildings</topic><topic>Buildings. Public works</topic><topic>Chimneys</topic><topic>Computational efficiency</topic><topic>Computing time</topic><topic>Cowshed</topic><topic>Durability</topic><topic>Environmental engineering</topic><topic>Estonia</topic><topic>Exact sciences and technology</topic><topic>Forestry</topic><topic>Housing</topic><topic>Indoor</topic><topic>Life sciences</topic><topic>Loose housing</topic><topic>Mathematical analysis</topic><topic>Moisture</topic><topic>Relative humidity</topic><topic>Rural</topic><topic>Spatial distribution</topic><topic>Standard deviation</topic><topic>Temperature distribution</topic><topic>Uninsulated</topic><topic>Vapour</topic><topic>Ventilation</topic><topic>Ventilation. Air conditioning</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pajumägi, A.</creatorcontrib><creatorcontrib>Poikalainen, V.</creatorcontrib><creatorcontrib>Veermäe, I.</creatorcontrib><creatorcontrib>Praks, J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Sustainability Science Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environmental Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Building and environment</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pajumägi, A.</au><au>Poikalainen, V.</au><au>Veermäe, I.</au><au>Praks, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spatial distribution of air temperature as a measure of ventilation efficiency in large uninsulated cowshed</atitle><jtitle>Building and environment</jtitle><date>2008-06-01</date><risdate>2008</risdate><volume>43</volume><issue>6</issue><spage>1016</spage><epage>1022</epage><pages>1016-1022</pages><issn>0360-1323</issn><eissn>1873-684X</eissn><coden>BUENDB</coden><abstract>Ventilation in the building is to assure a microclimate suitable for humans and animals as well as the durability of structures. Based on the data from literature theoretical heat and moisture balancing ventilation rate calculations for uninsulated cowshed are presented. At an indoor temperature of −6.7
°C and indoor–outdoor temperature difference of 1
°C, the theoretical ventilation rate of 2300
m
3/h per cow is necessary to remove the water vapour produced by the cows from the building. At a difference of 2
°C the ventilation rate of 1200
m
3/h per cow and at 5
°C 530
m
3/h per cow is needed. But these calculated ventilation rates are probably unrealistic. Traditional methods are unreliable for uninsulated cowsheds and instead of that an alternative method for evaluating the ventilation rate is needed.
A good possibility to evaluate the ventilation is to study air distribution in the room, which is more qualitative than ventilation rate.
From the parameters of air distribution (air temperature, relative humidity and air velocity) air temperature is the most sensible indicator for ventilation.
The use of the spatial temperature distribution is proposed there as a measure to assess the ventilation's efficiency.
Standard deviation of indoor air temperature characterizes ventilation efficiency in the cowshed:
•
s⩽0.8—ventilation is good—mark 1;
•
s=0.9,…,1.3—ventilation is satisfactory (lack of animals in number or ventilation openings are too widely open; effect of chimney does not work)—mark 2;
•
s⩾1.4—ventilation is unsatisfactory (important ventilation openings are closed)—mark 3.
Complete closing of ridge vent has a sever impact on the ventilation and must be avoided.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.buildenv.2007.02.015</doi><tpages>7</tpages></addata></record> |
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| ispartof | Building and environment, 2008-06, Vol.43 (6), p.1016-1022 |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Air distribution Air temperature Air velocity Animals Applied sciences Building technical equipments Buildings Buildings. Public works Chimneys Computational efficiency Computing time Cowshed Durability Environmental engineering Estonia Exact sciences and technology Forestry Housing Indoor Life sciences Loose housing Mathematical analysis Moisture Relative humidity Rural Spatial distribution Standard deviation Temperature distribution Uninsulated Vapour Ventilation Ventilation. Air conditioning |
| title | Spatial distribution of air temperature as a measure of ventilation efficiency in large uninsulated cowshed |
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