Hi guys (ladies), have any of you any experience with radiant tube heating? I am trying to design one for my greenhouse and have one or two questions. Firstly, are thin wall tubes or thick wall tubes better at drawing the heat from the gases? I have a pipe run of aprox. 40`(flattened s shape) and am hoping to draw all the heat from the gas, so much so that i hope to need an extractor fan at the exit. Also, are larger/smaller tubes better? I have been advised that a tube of at least 1.5 times burner blast tube should be used at least at the beginning, but not sure about the rest. Any help/ advise would be much appreciated, thanks in advance, Jim.
Radiant tube heating
- Thread starter Jimstewart
- Start date
have a look at shwank heaters, or ambirad heaters
Yeah thanks mate, but i need to fire it with kero and the ones ive seen from the likes of ambirad use gas. Plus i like the homemade idea! Fabrication is a strong point but not the experience in this field. I was hoping you guys may have some ideas. Its basically a Riello 40 burner blowing down a steel tube with a crude heat exchanger around the last run of tube.
your 40 foot of steel pipe IS a heat exchanger!!!
plus you need to get rid of your flu gases, oftec eng to sign off burner
commision, SEPA will need to know about your oil tank set up etc etc
all the best anyway James
plus you need to get rid of your flu gases, oftec eng to sign off burner
commision, SEPA will need to know about your oil tank set up etc etc
all the best anyway James
D
Dick Puller
oftec eng to sign off burner
commision..........................Not the case in Scotland OFTEC means feck all here.
Radiant tubes are fitted at high level & painted mat black. In days of old when men were.......Greenhouse cast iron pipes were fitted, but any kind of emitter will do the job - if you have enough to get the temperature up.
commision..........................Not the case in Scotland OFTEC means feck all here.
Radiant tubes are fitted at high level & painted mat black. In days of old when men were.......Greenhouse cast iron pipes were fitted, but any kind of emitter will do the job - if you have enough to get the temperature up.
You will need a very high Greenhouse, as the Radiant tube should be installed at least 2.5 - 3.0 mtrs above floor, your plant will probably wilt and die as radiant heat is really vicious, Most horticulturists favour warm air heating, with a constant running blower to keep the temperature even all around the plant house, most use down flow heaters with polythene tubes as ducts with slits cut into them at regular intervals to suit the stagings etc 
Thanks for you answer mate, much appreciated. I never considered the heat being so strong. I may have to consider using the `powermatic` idea instead.
have a look at Priva heaters, dutch co. we use a lot of their direct fired gas units, i know you are using kero, might have something there
or fit an oil fired boiler and low level 1" finned pipe,pump,zone valve and stat
or lpg fired priva da 10 direct fired heaters
or fit an oil fired boiler and low level 1" finned pipe,pump,zone valve and stat
or lpg fired priva da 10 direct fired heaters
Priva make an Oil fired version of their greenhouse units direct fired so run on kero only, enhances the atmosphere with CO2 as well
looks like jims got a solution then bm2
i`ll thank you and you thank me
i`ll thank you and you thank me
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