RE: Re: [EnergyPlus_Support] water temperature in plant loop is getting too hot

[<alexmac_00@xxxxxxxx>]

yes, the bypass is there! I guess I have found the issue. I hard-sized (oversizing a lot) the heating coil..if now I use the autosize everything is fine 

---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <david.j.reddy1@...> wrote:

Do you have bypasses on the demand and supply sides of the loop?  Also, if you are hard-sizing variable speed pumps, I have found that having a Pump:Minimum Flow Rate >0 will result in the pumps running even when there is no demand, and the pump heat builds up over time...
David

On 11/27/2013 6:46 AM, alexmac_00@... wrote:

 

Dear users,

I am getting an error saying that the water temperature in HW plant loop is getting too hot, and the simulation fails. I have read few other conversations on this topic, but I hope that someone has some more tips. 
I believe that there is something wrong with the pump (constant speed), also because I can solve the issue by replacing the constant speed pump with a variable speed pump. 
But theoretically it should also work with the constant speed operating as an on/off system. Any clue? 

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