Subject	In addition to the heat capacity, you need to consider>>>
Posted by	PEwithaZ on August 20, 2003 at 1:23 PM
	This message has been viewed 114 times.
In Reply To	Engine cooling theory... (very boring, Cliffs notes at top) posted by Kenny 9 psi on August 19, 2003 at 09:27 PM
Message	heat transfer. A large capacity for absorbing heat will be meaningless if you cannot move the heat from the engine body to the coolent. Heat transfer is determined by the following equation H=UA(Delta T) where H is the heat transfered, U is the overall heat transfer coefficient Delta T = the temperature difference between the heat source and the heat sink. U incorporates several factors, including the conductivity of the engine block (corrected for any corrosion), but factor most effected by the coolent properties is the water side film coefficient. Water has a reasonalby favorable film coefficient, but the addition of antifreeze degrades this considerably due to the increase in surface tension. The addition of surface tension reducers (e.g. Redline Water Wetter, Purple Ice). Improves the heat transfer from the metal surface into the bulk liquid. NO ELF's (Environmental Lunatic Fringe) What does NO ELF's mean RECYCLE PAPER - KEEP A TREE FROM BEING PLANTED 208.5 rwhp dynochart I deal in facts and figures, not feelings
Follow Ups	Engine cooling theory... (very boring, Cliffs notes at top) - Kenny 9 psi 21:27:19 08/19/03 There are two reasons antifreeze, freezing & lubrication - Turbodog (CT) 21:49:21 08/19/03 As mentioned below, antifreeze also increases boiling point. - Kenny 9 psi 23:36:22 08/19/03 Does antifreeze raise the boiling temperature of water also? - CaptK(ATL) 22:08:46 08/19/03 raises bp/lowers ability to transfer heat. Tdog is spot on - FLYT300 22:28:59 08/19/03 Pressure raises the boiling temp of water though... (n/m) - quikz 23:13:51 08/19/03 I know... (n/m) - CaptK(ATL) 10:08:06 08/20/03 Damn...I can't find my Thermodynamics book - Tredmil 22:28:22 08/19/03 simple solution: water + redline water wetter (n/m) - crazydonkey 22:50:08 08/19/03 Good post =). (n/m) - Kenny 9 psi 23:38:53 08/19/03 Glad to help. - Tredmil 01:23:10 08/20/03 Reactors use heavy water though--Deuterium or Tritium - therinL 10:13:20 08/20/03 ...and that's something you don't want in your car. - Kenny 9 psi 09:08:40 08/21/03 What about..... - Christopher 23:45:31 08/19/03 That has a specific heat of 2.67 j/g C. No better than... - Kenny 9 psi 08:54:57 08/20/03 Ok I..... - Christopher 17:41:38 08/20/03 Re: Ok I..... - Kenny 9 psi 09:19:28 08/21/03 All our racers use water with corrosion inhibitor. - zads 07:40:35 08/20/03 i would argue there's something better than water >>> - Bernie (OOParts International) 10:38:27 08/20/03 In addition to the heat capacity, you need to consider>>> - PEwithaZ 13:23:52 08/20/03 Good info =). (n/m) - Kenny 9 psi 16:51:24 08/20/03 I LOVE seeing posts like this - a model for all to follow - blaZe 13:29:27 08/20/03 w00t! (n/m) - Kenny 9 psi 16:49:01 08/20/03 Ever consider heavier isotopes of H? HEavy Water? (n/m) - Borg79(ON) 16:57:21 08/20/03 Nope. Same specific heat, but much more expensive... - Kenny 9 psi 09:07:10 08/21/03
Post a Followup	You cannot reply to this message because you are not logged in.