ᐅ Calculation of Electricity Consumption Based on Heating Demand?
Created on: 8 Feb 2018 20:02
T
tecker2010
Hi,
maybe someone can help me out here.
If I know the heat demand of my house, how can I estimate the approximate annual electricity consumption from that?
My heat demand is roughly 10 kW (including hot water). What other values do I need to calculate the electricity usage? I plan to generate the heat with a monovalent air-to-water heat pump.
I keep coming across full load hours (usually given as a standard 2,000 hours) and the annual performance factor (seasonal coefficient of performance) of a heat pump. Is that all I need?
10 kW * 2,000 h (hours) = 20,000 kWh (heat energy).
20,000 kWh / 2.8 (annual performance factor) = 7,143 kWh of electricity used. Is that correct? I know a detailed calculation is much more complex (transmission losses, etc.). A rough estimation would be enough, but I think I might be missing something and also find the 2,000 full load hours too approximate.
Looking forward to your feedback.
maybe someone can help me out here.
If I know the heat demand of my house, how can I estimate the approximate annual electricity consumption from that?
My heat demand is roughly 10 kW (including hot water). What other values do I need to calculate the electricity usage? I plan to generate the heat with a monovalent air-to-water heat pump.
I keep coming across full load hours (usually given as a standard 2,000 hours) and the annual performance factor (seasonal coefficient of performance) of a heat pump. Is that all I need?
10 kW * 2,000 h (hours) = 20,000 kWh (heat energy).
20,000 kWh / 2.8 (annual performance factor) = 7,143 kWh of electricity used. Is that correct? I know a detailed calculation is much more complex (transmission losses, etc.). A rough estimation would be enough, but I think I might be missing something and also find the 2,000 full load hours too approximate.
Looking forward to your feedback.
tecker20109 Feb 2018 09:15Okay. The data was just an example. I was mainly interested in the calculation method. So, the 1,800 hours are used regardless of the type of heat pump generating the heat.
If the 1,800 hours are just a rough estimate, what data would be needed for a more precise calculation?
If the 1,800 hours are just a rough estimate, what data would be needed for a more precise calculation?
We have an annual performance factor of 3.76. The heat pump is a Waterstage WSYP100DG6 / WPYA080LG with a heating capacity of 8 kW (8.8 kBtu/h). So in our case, would the calculation be 8 * 1800 / 3.76? Or should the nominal heating capacity of 7 kW (7.6 kBtu/h) be used for the calculation?
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