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[EnergyPlus_Support] Re: Condensation on Radiant Cooling

Suggest you use radiant wall instead of radiant floor. Condensation may still happen, but being on the wall it will not cause someone to slip and a small drain at the edge of the floor below the wall can be a practical solution. More importantly, a radiant wall will have a better view factor with the occupants, unless they are sleeping on a stringed bed without cushions, and thus will be more effective for thermal comfort, a possible main reason of using radiant surfaces. ooi

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, sachin sharma <sachin_skit@...> wrote:
>
> Hi,
> 
> While modeling Radiant Floor cooling system with partial DOAS I am getting these warnings of floor condensation. I have chosen Simple Off as condensation control type in ZoneHVAC:LowTemperatureRadiant:VariableFlow object. I want to maintain my floor temperature between 20 to 21 °C (not below 19°C) that's why I have my ChW loop temperature as low as 15°C. Delta T I have taken as 5°C but still it is not sizing my radiant floor flow rate according to this delta T instead it is giving me a highly autosized flow rate of 9.36X 10-5 m3/s. Because of this I am getting overcooling on floor and getting these warnings. I have tried reducing the flow rate but then it does not give the desired cooling on floor. Can you suggest what wrong I am doing? I am attaching EIO and SVG file. Should I change the loop length or pipe dia? Currently the length is 30m and dia is 0.014m.
> 
> regards,
> 
> SACHIN SHARMA
>




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