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2019-07-24 07:42:34 -0500 marked best answer Thermal performance of tents- What is the best way of ground modelling?

I use EnergyPlus 9.0.1. I want to model the thermal performance of a tent. The tent doesn’t have any floor insulation. The floor is a kind of plastic foil. Moreover, I don’t have any information about the ground type. My question is- what is the best way to model the ground? I have done research on that and I understood that there are a few methods of ground-coupling modelling: 1. Simple method- assigning ground-contact surfaces to the ‘ground’ outside boundary condition and add the Site:GroundTemperature:BuildingSurface object. 2. Slab preprocessor 3. Site:GroundDomain:Slab object in EnergyPlus 4. Foundation:Kiva object in EnergyPlus.

Which method is the most suitable for me? And actually is there any difference between the slab preprocessor and the Site:GroundDomain:Slab object integrated with EnergyPlus?

Thank you in advance for any help.

EDIT

I performed a simulation of a tent using Kiva for the extremely cold climate in Canada (weather file CAN_NU_Resolute.719240_CWEC.epw). The tent was heated to the heating setpoint temperature of 15°C. I checked the heat transfer rate through the tent’s floor (1-inch layer of soil). And the results were opposite to my expectations. The results showed heat gains through the floor. I thought that maybe I made a mistake in my model so I did a test with the example model ZoneCoupledKivaSlab.idf. I run the simulation for the same weather file and I obtained heat losses through the floor (according to expectations). After that, I slightly modified the example model by changing only the wall materials’ thickness from the initial values to 0.005 m (Composite 2x6 Wood Stud R19 #1, Composite 2x6 Wood Stud R19 #2, Composite 2x6 Wood Stud R19 #3). I didn’t change the floor/slab construction. I simulated the model again and I obtained completely different results- heat gains from the ground (similarly to my tent model). I attached a chart showing the results. Could you please explain to me this outcome? image descriptionimage description

2019-07-24 07:42:34 -0500 received badge  Scholar (source)
2019-05-02 02:40:06 -0500 commented question Thermal performance of tents- What is the best way of ground modelling?

The only thing that I changed are the materials' thicknesses, please have a look at the picture above (yellow highlights

2019-05-02 02:37:34 -0500 edited question Thermal performance of tents- What is the best way of ground modelling?

Thermal performance of tents- What is the best way of ground modelling? I use EnergyPlus 9.0.1. I want to model the ther

2019-05-02 02:37:34 -0500 received badge  Editor (source)
2019-04-26 07:24:49 -0500 commented answer Thermal performance of tents- What is the best way of ground modelling?

I tried this approach and I have an additional question. It is too long to write it as a comment so please have a look a

2019-04-26 07:24:28 -0500 edited question Thermal performance of tents- What is the best way of ground modelling?

Thermal performance of tents- What is the best way of ground modelling? I use EnergyPlus 9.0.1. I want to model the ther

2019-03-12 10:38:28 -0500 commented answer Thermal performance of tents- What is the best way of ground modelling?

I see. Thank you.

2019-03-12 10:32:00 -0500 commented answer Thermal performance of tents- What is the best way of ground modelling?

Thank you for your answers. What do you mean with internal sources in my construction? In my case, the tent is air-condi

2019-03-12 09:55:16 -0500 commented answer Thermal performance of tents- What is the best way of ground modelling?

Thank you very much for your answer. And how about the Site:GroundDomain:Slab method? And how is it different from the

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2019-03-08 09:36:36 -0500 received badge  Student (source)
2019-03-08 08:14:37 -0500 asked a question Thermal performance of tents- What is the best way of ground modelling?

Thermal performance of tents- What is the best way of ground modelling? I use EnergyPlus 9.0.1. I want to model the ther