Hi everyone,

I am modeling one greenhouse for which I need to manually calculate latent load through evapotranspiration rate through plants in the space. I came across with some research where they talked about calculating evapotranspiration rate in mm/day or mm/hr.

http://edis.ifas.ufl.edu/pdffiles/ae/ae45900.pdf

also, I got this software on "land & water division" website to calculate ET rate: http://www.fao.org/nr/water/eto.html

Can someone please explain it to me if it makes sense to use this calculation for ET rate through crops in glass chamber? Why this unit is in mm/day (length/time unit)? Tried to look around but haven't got the explanation. Why it's not some volume/time unit? Is it mm/day for every sq ft or every sq metre?

Some inputs will be very helpful here. Thanks

Harshul Singhal, LEED AP BD+C
Project Consultant
Thornton Tomasetti
386 Fore Street, Suite 401
Portland, ME 04101
T +1.207.245.6060 F +1.207.245.6061
D +1.207.245.6074
HSinghal at ThorntonTomasetti.com
www.ThorntonTomasetti.com

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