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Cooling Sources in Incubators

This document estimates the cooling capacity needs of an incubator from different sources like water cooling, ventilation, and spraying. It provides calculations of heat production from eggs and machines, heat loss through ventilation and water cooling, and determines the necessary cooling water amount and spraying needed to maintain temperature balance. For multi-stage machines, an average embryo development stage of around 9 days should be entered.

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mahmud
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42 views2 pages

Cooling Sources in Incubators

This document estimates the cooling capacity needs of an incubator from different sources like water cooling, ventilation, and spraying. It provides calculations of heat production from eggs and machines, heat loss through ventilation and water cooling, and determines the necessary cooling water amount and spraying needed to maintain temperature balance. For multi-stage machines, an average embryo development stage of around 9 days should be entered.

Uploaded by

mahmud
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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This program estimates the cooling capacity of the different cooling sources in an incubator, cooling by water cooling , by

The heat production of the eggs and ventilation conditions of the machine needs to be filled in for the actual day of incuba
For multi stage machines an average embryo developmental stage of approximately 9 days needs to be filled in, which equ

calculation cooling capacity machine


unit value
Heat production of machine
heat production eggs W 0.15
eggs in machine # 60,000
heat production eggs W 9000
heat production ventilator W 1000
heat production machine kJ/s 10

heat loss through ventilation


ventiation cap m3/uur 200 energy content of air out
energy content air out 37,8-50 kJ/m3 93 temperature oC 37.5
energy content air in 20-50 kJ/m3 38 relative hum % 55
energy cont kJ/m3 93
heat loss through ventilation Kj/s 3.1

heat loss cooling water


temperature incoming water oC 15
temperature outgoing water oC 20
delta T cooling water oC 5
heat capacity water kJ/L/oC 4.2
cooling capacity kJ/L 21

Heat balance with sprayer off


heat production machine kJ/uur 36000
heat loss ventilation kJ/uur 11000
needed cooling cap kJ/uur 25000
cooling capacity per liter kJ 21
needed cooling water/mach l/uur 1190

how much spraying is needed if water cooling is not sufficient


actual cooling water amount l/uur 500
heat loss through cooling wat kj/uur 10500
heat loss through sprayer kJ/uur 14500
evaporative heat loss kJ/liter 2260
needed spraying l/uur 6.4
cooling by water cooling , by ventilation and by spraying.
in for the actual day of incubation.
eeds to be filled in, which equals approximately 0,02-0,03W

in in in
20 30 30
50 50 70
38 65 75

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