Suggestions to improve humidity in heat treatment shop
Suggestions to improve humidity in heat treatment shop
(OP)
I am new to this forum and I am not a professional HVAC person,so sorry, if there are some errors in my post or that it is too basic.
I need to have a high level of humidity in the heat treatment shop. Probably form a mist . This is necessary to improve the RH from 45% to 70% and above.
The castings are hardened by forced air cooling. If I could improve the humidity,the quality of castings would improve a lot.
I planned to use a scrapped fuel injector for spraying. But I am unable to build up pressures of 100 bar and above to form a mist.
I would like to know,if there are simpler methods ,or any assistance to improve the delivery of pressure pump.
Thanks in anticipation.
I need to have a high level of humidity in the heat treatment shop. Probably form a mist . This is necessary to improve the RH from 45% to 70% and above.
The castings are hardened by forced air cooling. If I could improve the humidity,the quality of castings would improve a lot.
I planned to use a scrapped fuel injector for spraying. But I am unable to build up pressures of 100 bar and above to form a mist.
I would like to know,if there are simpler methods ,or any assistance to improve the delivery of pressure pump.
Thanks in anticipation.
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year





RE: Suggestions to improve humidity in heat treatment shop
http://www.eng-tips.com/faqs.cfm?fid=376
RE: Suggestions to improve humidity in heat treatment shop
Looking towards more participative responses.
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: Suggestions to improve humidity in heat treatment shop
Is there airflow? If yes, how much?
What is the air temperature?
I doubt that a fuel injection nozzle will be capable of delivering enough water.
RE: Suggestions to improve humidity in heat treatment shop
In my plant I had a water curtain and sprinklers system to improve the RH. But in my new place ,this is difficult to implement. I must do, with only available resources.
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: Suggestions to improve humidity in heat treatment shop
It sounds to me that you need regular misting nozzles, not fuel injector nozzles.Misting nozzles can work on 50 psi of water.
I do not know the equipment you have in your new shop, but one alternative to a misting nozzle is a paint spray gun (hook up the water to the paint tube) if you have compressed air available.
Have you looked into evaporative cooling, where a natural fiber mat is placed over the intake of the fan and water dribbled over it?
B.E.
The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
RE: Suggestions to improve humidity in heat treatment shop
We need you to more precisely define the system and boundaries.
500 square foot room. Ceiling height?
Solid walls? openable windows? Louvers? No walls at all?
Four fans. Do they recirculate air from within the room, or bring in air from outside?
How much air does each fan move? If you don't have a way to measure that, what type of fan is it? How much power are the motors actually using?
What is the outside temperature and humidity?
RE: Suggestions to improve humidity in heat treatment shop
There are many inexpensive spray nozzles available that will operate as low as 25 psi. You do not want to use fuel injector nozzles. These misting nozzles spin the water flow as they leave the nozzle so the stream breaks-up into a cone shaped spray.
The cooling rate will be proportional to the water flow rate. Misting nozzles designed for cooling people have very low flow rates because they are designed to only cool the air and not get people wet.
RE: Suggestions to improve humidity in heat treatment shop
If you need humdity in excess of 70%,an airwasher is the way to go.Air washers typically deliver air change rates in excess of 50 which you can not deliver with fans with mist nozzles.Air washers use a water spray curtain or wet pad.
RE: Suggestions to improve humidity in heat treatment shop
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year