TY - GEN
T1 - Heat and moisture production of modern swine
AU - Brown-Brandl, Tami M.
AU - Hayes, Morgan D.
AU - Xin, Hongwei
AU - Nienaber, John A.
AU - Li, Hong
AU - Eigenberg, Roger A.
AU - Stinn, John P.
AU - Shepherd, Timothy
PY - 2014
Y1 - 2014
N2 - The total heat and moisture production (THP and MP) values of pigs that are currently published in ASHRAE standards are from data collected in either the 1970s (nursery piglets) or the 1950s (growing-finishing pigs). These series of studies, conducted to systematically update the THP and MP standards, includes a series of four indirect calorimeter studies (nursery, growing-finishing gilts, and finishing barrows), and six facility-level studies (nursery, growing, early finishing, late finishing, gestating gilts, and farrowing sows and litters). The studies were completed at various temperatures from thermal neutral to hot conditions, demonstrating the trends that HP and feed intake decreased while MP increased as environmental temperature increased. Overall, THP was observed to be 16% higher than current standards. To predict MP from the entire facility rather than just the animals, the waste-handling systems, sprinkler cooling systems, and nonvented gas-fired heaters were monitored and found to contribute significantly to the overall MP. Continuous measurements showed a diurnal THP pattern that was higher during light periods than during dark periods, with peaks just after lights came on and just before lights went off These updated THP and MP values are essential in designing new and managing current swine facilities.
AB - The total heat and moisture production (THP and MP) values of pigs that are currently published in ASHRAE standards are from data collected in either the 1970s (nursery piglets) or the 1950s (growing-finishing pigs). These series of studies, conducted to systematically update the THP and MP standards, includes a series of four indirect calorimeter studies (nursery, growing-finishing gilts, and finishing barrows), and six facility-level studies (nursery, growing, early finishing, late finishing, gestating gilts, and farrowing sows and litters). The studies were completed at various temperatures from thermal neutral to hot conditions, demonstrating the trends that HP and feed intake decreased while MP increased as environmental temperature increased. Overall, THP was observed to be 16% higher than current standards. To predict MP from the entire facility rather than just the animals, the waste-handling systems, sprinkler cooling systems, and nonvented gas-fired heaters were monitored and found to contribute significantly to the overall MP. Continuous measurements showed a diurnal THP pattern that was higher during light periods than during dark periods, with peaks just after lights came on and just before lights went off These updated THP and MP values are essential in designing new and managing current swine facilities.
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M3 - Conference contribution
AN - SCOPUS:84904332445
SN - 9781936504701
T3 - ASHRAE Transactions
SP - 469
EP - 489
BT - ASHRAE Transactions - ASHRAE Winter Conference
T2 - 2014 ASHRAE Winter Conference
Y2 - 18 January 2014 through 22 January 2014
ER -