[TRNSYS-users] How to calculate electricity consumption by a house?

[Alastair McDowell]

Hi Sandeep,

There is no type to specifically calculate electricity consumption of a house. You will have to do some calculations in the Studio to sum up all the electrical energy usage throughout the year.

For example, if your lighting scheme is controlled by a timing schedule or control function, you can sum up (using a Type 24 integrator) the total period of time that the output control signal was on, and multiply by the electrical energy consumption of the unit. Remember the base units of energy rate (kJ/hr) multiplied by hours on (hr) will output the energy in kJ, easily converted to kWh.

If using a schedule within TRNBuild, you can output the value of the schedule by creating a new airnode output, NType 28 gives the value of all schedules. Double click to specify which schedule to output.

Depending on what type of heat pump you are using, look through the outputs to determine the electrical energy usage of the heat pump. For example Type 941 air-water heat pump, output 15 gives the total heat pump power (compressor + controls + blower) which also includes auxiliary heating. Integrate this power over the year to find the total electrical energy consumption of the heat pump.

I hope this answers your question.
Kind regards,
Alastair McDowell
Engineering Consultant
Energy Analysis & Engineering - Enabling innovation for a sustainable future
T: +61 450 600 842
E: alastair.mcdowell at energyae.com<mailto:alastair.mcdowell at energyae.com>
608 Harris St Sydney NSW 2007 Australia | http://www.energyae.com<http://www.energyae.com/>

From: TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org] On Behalf Of Sandeep Singh Chahal
Sent: Sunday, October 4, 2015 1:16 PM
To: trnsys-users at lists.onebuilding.org
Subject: [TRNSYS-users] How to calculate electricity consumption by a house?



Hello TRNSYS users,

I am working on a TRNSYS model to calculate the total electricity consumption by a two story building which includes all household appliances.

Firstly, I want to calculate the total electricity consumption by this house.(using type 56). This house includes household appliances (defined with in TRNbuild) and connected with a heat pump.

I have looked into the documents but I didn't see any type to calculate the total electricity consumption (KWh) by a house. I might have missed it.

Is it possible to calculate the total electricity consumption? If yes, which type I should use?

Thanks in advance!
Sandeep Chahal

Research Assistant

UAB School of Engineering
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