E+, Huge heat transfer between floor and ground

edit

My u value is around 10 without film and 3.5 with film (included my rsi and rso). My conductivity is 2 for my slab (only concrete).

What i dont really understand is How i Can get - 4000W. Because heat transfer = surface (270) x différence of température (0.5 or 1) x Uvalue (3.5 with film according to my enveloppe summary).
I have a problem of scale here.

The formula and units are correct. I'm not sure how you would have 0.5 or 1 temperature difference. The Surface temperature that you have set for your model for all the seasons (24C) is the exterior temperature. Your interior temperature is set to be 20C (check ALL OBJECTS IN CLASS: HVACTEMPLATE:THERMOSTAT). So the difference in your temperature is about 4C during the heating days.

I have changed this parameter, I put 24 C for the heating thermostat but I still have my -4000 W of heat transfer.
In my calculation, the delta T is equal to 4 C. So it means, the ground temperature is around 20 C.
I double checked my value, seems to be correct or consistent. I am blocked, Any other clue ?

Ok thank you, I will assume that this value is correct because the inputs are corrects but I am still very surprised by this value, I did many simulations (not with E+), I never got this value for the floor.

Just out of curiosity, what is the typical number you get for the heat transfer through the floor during the peak cooling load? And under what temperatures?

For your update answer: Thank you for your clear explanation and for the time spent, I will be aware of this for my next projects in this part of the world

@ Mantra U A (delta T) is a steady state heat conduction equation which in general you will not see. In reality, the effect of thermal mass of the structure make the conduction process through envelope transient. solving Transient heat conduction is not that easy and it is not as straight as U A (delta T). the conduction that you are seeing now (present hour) is actually the effect of already stored heat within the structure in past and the present. for this,you investigate upon surface stored heat, surface inside face conduction heat transfer and surface outside face conduction heat transfer

@ Mantra but then again, you cannot back calculate these values as there are again lot of terms of conduction transfer function values are involved to solve this transient heat conduction....

@Siva, understood. Its more complex than I thought. But very interesting. I didnt know that the ground has this impact on cooling capacity

@ Mantra Apart from above said components also look into surface inside net thermal radiation heat gain rate, surface inside face solar radiation gain rate (if there are windows in the space...there is a possibility for the solar radiation to fall on to the floor directly and then it will get converted into long wave radiation)...all these components are the heat gain by floor surface. depending upon its absorptivity and emissivity properties, the stored heat will get re-radiated into space. so, finally u have to see the effect of all these components

I will have a look to all these data and output. Very insteresting. By the way, may I know how you determine the ground temperature ?
Do you use Slab ? I have read that slab is not very accurate. Or kiva ? For the moment, I dont know how to use Kiva, I have some unconsistent result, even when I follow the exemples provide by E+. Or another method ?

@ mantra sorry, I have not done much research on that part. I heard Kiva is accurate but never worked on it...