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Re: [TRNSYS-users] From Energy To Power
Mattia,
There isn't really any simple answer to your question. The answer
depends (among other things) on the kind of system you are using, on the
system controls, on the efficiency of the equipment that you install.
You have computed the space loads; now you have to model the system in
order to determine how much energy it will consume for energy delivery,
fan power, pump power, and central plant power. If you want to be very
simplistic about it, you can assign the system an overall COP and/or
efficiency. For example, an average boiler is about 80% efficient. If
you neglect all of the energy required to move the heat from the boiler
to the space you can say that the amount of fuel required is (heat
load)/0.8.
Regards,
David
On 6/25/2012 02:50, MATTIA ANDREA RIO wrote:
Good Morning!
I have a question: In my model in TRNbuilt i have inserted, into any
airnodes, 0heating type, cooling type and ventilation type. So, now I
would need to extract the summer and winter requirements of energy for
my building (in kW), but Simulation studio give me the possibility to
calculate the energy only ( in kWh), like QSENS or QLAT.
In other words, I need to know the power in kWatt necessary to size
the air ventilation machines, derived from building heat loss during
the seasons, and not kWatt Hour.
thanks!
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David BRADLEY
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Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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d.bradley@tess-inc.com
http://www.tess-inc.com
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