@Littelinch
I wanted worst-case scenario assumption. Pipe is lagged and boxed in all cases BUT air flow would always be zero across pipe whether boxed or not (we are talking about a room that's well sealed to atmosphere and usually around 3M2-5M2 floor area).
Stuffing with insulation is a no-go...
Lukezo, Now THAT is a fantastic, and absolutely achievable solution!!
Incidentally the pipe is being boxed in, so all we need to do is make a second penetration adjacent to the pipe penetration, we already have an un-sealed hole at the head position (which will encourage flow of air), and hey...
IRSTUFF: I've applied that exact approach in a big loft in a care home before. Avoided trace heating. We measured water temp on end of 'return' leg to prove minimum temp. It worked surprisingly well, but was a ball-ache to install pipework in a perfect loop (to guarantee flow) whilst picking up...
Thanks George, but that's not an option we can use as it will cause the pumps to run too often, which will (in turn) cause a fault on the monitoring system due to continual (or regular) loss of pressure. It also introduces requirement for drainage, and cost of parts, so we'd probably be at...
LittleInch,
I couldn't agree more! And that is my default position, but I am just mildy nervous about the potential risk. Having done some VERY rough tests recently with a digital thermometer, and i'm seeing a bigger differential between outdoor temp and balcony temp versus balcony/indoor temp...
@Danschwind thank you kindly. I've got absolutely no experience with FEA (had to look up what it meant!), so without third party input that's a no-go. I was already considering a professor or university bod of some sort, just not quite sure how to go about that. I'll contact the 2 local...
@littleinch Thanks for your input, i'll answer each part directly to be concise:
The test was over several days, and was from a pipe fed from a heated area (kitchen). The short section of pipe was around 300mm long IIRC, but i cannot recall if it was insulated in all honesty. This was not...
Thanks Chicopee.
I’d not considered that heat transfer will differ in vertical versus horizontal but it’s pretty obvious that convection will come into it when vertical.
All the pipe in the above situation is horizontal though.
Are you able to guide me on how to calculate the energy (or heat)...
Firstly, thank you for the very quick responses! Much appreciated.
When you say 'virtually no heat transfer" i need more specificity than that, i.e. i need too know exactly how much transfer there will be. There must be some, and some arbitrary tests (involving a length of pipe and a freezer!)...
Hi All,
I've had a look through the forums and there are 2 similar threads, but both have variables that mean I'm personally unable to apply the answers to my particular problem.
The situation is that I have a pipe that passes from a heated space into a (potentially) unheated space. The...
