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Date:         Sun, 11 Nov 2001 14:26:27 -0600
Reply-To:     Marshall Ruskin <mjruskin@HOME.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Marshall Ruskin <mjruskin@HOME.COM>
Subject:      Re: Dramatically Improving AC capacity
Comments: To: Joel Cort <joel_cort@yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"

I like this idea the best so far. The thing is, just adding another evaporator is not going to increase the heat rejection capacity any - you need more compressor power for that.

Marshall

> All, > > I've, been toying with the engineering idea to integrate a second AC > unit into the front heater/fan unit. The air blowing in or pulled by > the squirlcage fan would flow through the AC fins just like the > heater core. This would alow for no interior modifications and the > use of all the existing front vent system. But rather than blowing > warm outside air it would blow cool conditioned air .... just like > all the other frigin vehicles! > > The trick is two fold: > 1) Tapping into the existing high and low pressure AC hoses up front > by the radiator. Also refilling the system for the increased > capacity. > > 2) inserting the AC evaporator into the the stock front heater unit > in a way that will fit under the dash and still allow existing > vent/heat to operate. > > The engineering of connecting a front and rear ac unit is not too > hard since this is done on US Cheby vans. Just a T connection and a > regulator valve. > > The hard part is to identify a potential area of void in the existing > heater unit and duct work and to find an evaporator that will fit. > The rest is a glue job. > > Just my thoughts on AC improvements. > > Joel > 89 Syncro Westy > Rochchchchchcester NY. at a cool 38 degrees this morning > > > --- Marshall Ruskin <mjruskin@HOME.COM> wrote: > > Hi Volks: > > > > The one deficiency remaining unresolved with our Vanagons - is the > > inadequate capacity of the AC system, and I'd like to start a > > thread dealing > > with remedying that. > > > > Problem: > > > > The AC capacity of our Vanagons is inadequate to reject the amount > > of heat > > to necessary to maintain passenger comfort on very hot and humid > > days. > > > > Background: > > > > Many of us have worked hard to improve our AC system's efficiency, > > both by > > improving the thermodynamic efficiency and by improving the > > airflow, and > > that's great. However, on very hot and humid days - it is barely > > adequate > > but usually inadequate for complete respite from discomfort. > > > > Discussion: > > > > There are several approaches to improving the AC system available: > > > > 1. increasing the capacity of the existing system; > > > > 2. installing a higher capacity system to replace the existing > > one; > > > > 3. Installing a secondary AC system to provide additional > > heat-rejection > > capacity; > > > > 4. Alternative approaches not listed. > > > > Each of these approaches is a compromise between cost (including > > time), ease > > of implementation, reliability and likelihood to meet performance > > requirements. > > > > Action: > > > > I request that specific ideas be brought forward from the list, and > > that > > these ideas be framed by the points 1 - 4 above. By framing the > > ideas as > > requested, we can keep the discussion organized. > > > > Regards, > > > > Marshall Ruskin, 84 Westy > > Aloha from Winnipeg! > > > __________________________________________________ > Do You Yahoo!? > Find a job, post your resume. > http://careers.yahoo.com


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