hello I defined an earth-tube in energyplus with different depths and lengths and run; I want to know the effect of eath-tube in cooling and heating. but there is a problem in outputs! heating/cooling provided by the air from the earth tube for example for 5m depth is lower then 2.5m! and also for 120m length is lower than 60m! But in total cooling/heating restricts by inceasing depth and length decreases. whats wrong with it?? please help... thank you
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