panel rads - how do they integrate?

[Deleted User]

You're hook on hydronics. You'll become a regular hydronoholic.

Hello, my name is Mark Eatherton, and I'm a hydronoholic...

Hello Mark, one day at a time...

Let me give you some things to consider. You are obviously familiar with the American way of hydronics, that being the BANG BANG control method. BANG the system is on, BANG the system is off. All temperatures are turned to their maximum potential regardless of real time requirements and demands.

Consider that hydronics had its roots across the pond. THey have LIGHT years of experience on us rookies. Kind of like sitting in an old church over there that is 3 times as old as the US of A... Sets the perspective for you.

Anyway, they do a continuous flow of fluid with an outdoor reset program that has proven to deliver the highest degree of comfort with the lowest cost of operation. It will require some education on your part and a lot of preliminary planning, but the benefits are well worth the price of admission. Think non electric controls at the point of use (POU)

As for the use of panel rads and lower temp rad floors, it is done on a daily basis in our company. You have some options. If you size the panel rads for operation at a lower temp, you will pay more for panel rads, a little less for physical plant, but your overall cost of operation will be significantly less when using ModCon heat sources, or GSHP or solar thermal generators, and the overall comfort factor will be significantly higher.

If you do choose to go with the higher temp panel rads, try and keep your maximum supply temps down to around 160 degrees which will give you a return water temp that is within the ModCOns sweet spot based on a 30 degree delta T. This again requires some non typical thinking, because depending upon the piping methodology at the POU, you may need to increase the size of the emitters down stream as the fluid cools.

Might as well kiss your wife and life good bye. You'll be spending the rest of your life, stuck in front of the computer, reading the Wall....

ME

KW_2

Panel Rads –how do they integrate?

OK, everyone has noticed my flurry of posts. I woke up at 3:30 AM pondering the hydronic heat for our project. That’s a good thing, right? I mean not being able to sleep because of the amazing world of hydronics? Maybe it is just sad…


One last question (well, likely not the last!). Wondering about using panel radiators (like Myson’s Select Panels) in a system that includes in-floor hydronics using zone pumps. I’m wondering how the panel rads will integrate. I assume they’ll be running a higher water temp so I’m guessing some sort of tempering valve will be needed. Panel rads with onboard t-stats would seem to be a good way to allow room-by-room zoing. But I'm not sure what is required in terms of integration. If each panel has a t-stat on it, when it calls for heat, will there have to be a separate pump that kicks on for just that single panel? Seems like that would make a panel rad system very complicated and expensive. I know each system is unique but I’m hoping that someone can give me a general idea of how this works.


Now, I should go back to bed to make up that lost sleep…. )

Dave_4

your talking about TRV nice thing to have but you should put on a pressure differential bypass to prevent dead heading the circulator when some of the trv are off

also what kind of boiler and control are you thinking about using you will have a high temp side for panel and a low temp side for the floor.

will you do pri/sec pipeing and home run for the panel rads i hope?

thanks
Jason

kevin coppinger_4

What temp. is.....

the design for the floor? if you design the panels to work at the same temp as the floor temp it could simplify matters...I like using a manifold as a set up for the panel rads and home run each...kpc

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Dave_4

simple,

make the system on an injection system with variable speed and trv's. or complimentary with two seperate injection systems and zones....myson panels work good. when you have predominately panel rads and baseboard you can use a RMB from taco and trvs..that way you can turn the individual panel up or down or a string of panels with a zone valve or entire floors with outside air warm weather shut down.