- Joined
- May 11, 2004
- Location
- Montana tech Butte mt.
Remember if you are using 1/2" tubing for most flow rates you see in a WCing system the pressure drop is about nil.
When it comes to radiators it depends on the design. I don't know if anyone has published P-Q curves for various radiators or not but using that and Cathars work that talks about differences in flow rates and temperatures in a loop you can approximate fairly well what your temperature differences are going to be just based upon flow rates.
Finally 3 radiators does not guarantee you being able to run your radiators without fans. Consider that average h values for air are somewhere between 25-250 (i'll put the units on when I wake up in the morning) and the average h values for forced air start at 250 and go to somewhere between 1500 and 4000 (i'll give you a better value in the morning) so that one fan is increasing you heat dissapated by a massive amount.
When it comes to radiators it depends on the design. I don't know if anyone has published P-Q curves for various radiators or not but using that and Cathars work that talks about differences in flow rates and temperatures in a loop you can approximate fairly well what your temperature differences are going to be just based upon flow rates.
Finally 3 radiators does not guarantee you being able to run your radiators without fans. Consider that average h values for air are somewhere between 25-250 (i'll put the units on when I wake up in the morning) and the average h values for forced air start at 250 and go to somewhere between 1500 and 4000 (i'll give you a better value in the morning) so that one fan is increasing you heat dissapated by a massive amount.
. Add that to the fact I run my heater cores in parallel instead of series and there just isn't much resistance in that part of the loop compared to the rest of it ... 
