Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!spool.mu.edu!rex!rouge!ralph!elgamy!elg From: elg@elgamy.raidernet.com (Eric Lee Green) Newsgroups: comp.sys.amiga.hardware Subject: Re: The Fanning of the Amiga Message-ID: <00677315168@elgamy.raidernet.com> Date: 19 Jun 91 06:06:08 GMT References: <3079@public.BTR.COM> <3025@public.BTR.COM> <3004@public.BTR.COM> <1339@cbmger.UUCP> <00676835659@elgamy.RAIDERNET.COM> Organization: Eric's Amiga 2000 @ Home Lines: 48 From article <3079@public.BTR.COM>, by thad@public.BTR.COM (Thaddeus P. Floryan): > In article <00676835659@elgamy.RAIDERNET.COM> elg@elgamy.RAIDERNET.COM (Eric Lee Green) writes: >> I assume you've never been a Southerner in the pre-air-conditioner era? >> You learn a lot about fans and cooling under such conditions :-). > > Well, would having lived in San Antonio TX for 5-1/2 years, El Paso TX for > 3 years, Las Cruces/White Sands Missile Range NM for 4 years, etc. qualify > as being a "Southerner" ? :-) No, because of the low relative humidity. Think of Florida. Evaporative coolers are useless in this kind of humidity, down here in the real Southland. Before the advent of inexpensive air-conditioning, but after the advent of electric fans, the electric fan was the major player. Cooling a whole house with an electric fan, whether it be a window fan or an attic fan, was done by sucking air OUT of the house, as I mentioned before. With careful consideration of window placement (while designing the house) and window openings (while living in the house), you could get it so that, e.g., a cool breeze blew through the dining room window, through the kitchen, then out the window fan in the back bedroom. If you'd had the window fan blowing inwards, it would have only "cooled" the back bedroom. Which would have left you sweltering in the dining room and kitchen. A computer is similar to a house in that plugging in cards chops it up into "rooms". It's simply impossible to blow air directly on each and every card to eliminate heat buildup, unless you have a fan for every "room". > Back then, (1950's and early 1960's) we had evaporative coolers that clearly > blew cooled air INTO the houses/domiciles. Most home air conditioners, even > today, blow refrigerated air INTO the home. Bad comparison. Home air conditioners have a vent for every room -- basically, they've split up the fan to send part of its flow to each compartment. I suppose a case could be designed that would have forced-air ducts in it, but that'd be expensive (since you couldn't just stamp it out of sheet metal or pour it into a one-piece plastic mold). > I still maintain that a filtered positive-pressure computer cooling system is > "better" than a non-filtered volumetric-evacuation system True, to some extent. However, it's difficult to design such a forced-air cooling system, due to the ductwork required. Plus the filters tend to clog. Most home computers don't have a serviceman on service contract come by every month to change the air filters. -- Eric Lee Green (318) 984-1820 P.O. Box 92191 Lafayette, LA 70509 elg@elgamy.RAIDERNET.COM uunet!mjbtn!raider!elgamy!elg Looking for a job... Unix/Amiga/C... tips, leads appreciated.