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Old Nov 1st 2017, 04:26 AM   #1
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Greetings all

Hi everyone, I am currently seeking help for one of my assignments involving the topic of thermodynamics in domestic heating. I will be comparing the gas furnace and AC heater for benefits, advantages and vice versa. Does anyone have any suggestions on how or what I should do to calculate the efficiency in each method for heat transfer and time taken? The calculation will used fixed perimeter including a set area of 20 square meters and 4 metre high ceiling. Assume room is square, please suggest anything I should do for the assignment. This is kind of urgent..yours sincerely , person from Austrayyya.
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Old Nov 1st 2017, 05:45 AM   #2
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OK I realise that this is an exercise, but heating one room with a gas furnace?
What sort of gas?
Air supply? (regulations etc)

Where is this furnace and will it be direct ie a gas fire or indirect ie via hot water or hot air?

The furnace can also provide domestic HW, which the electric can't directly.

AC heater again what sort of heater?

IOW you need to narrow down the systems for comparison.
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Old Nov 1st 2017, 07:02 AM   #3
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When choosing heating systems efficiency is really quite low down on the decision criteria (and even then, usually only as it relates to running costs).

Efficiency is also usually defined only in a very local sense.
The efficiency of the original generation and transmission of the fuel/power source is barely considered.

The end-to end lifetime impact assessment of your heating appliances is difficult to define, let alone estimate,
but the concept might make an interesting annex to your assignment report.
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