QueenBee
Posts: 1564
Joined: Sun Aug 08, 2010 5:14 pm
Delivery Date: 20 Jun 2011
Leaf Number: 2062
Location: Bellevue (Seattle), WA

Re: put the condenser for defrost mode inside the car.

Sun Mar 23, 2014 12:39 am

LeftieBiker wrote:Miss Piggy misunderstands. I'm not arguing that the condenser placement would be a problem, I'm saying that moisture will build up in the cabin in Winter in *either* case, if fresh air is excluded.


I presume by fresh air you mean outside air. So your argument is that excluding outside air will cause the drain tube to freeze and moisture to build up? Not sure how outside air is going to keep the drain tube from freezing.

In any case I have no idea how whatever point you are poorly attempting to make has anything to do with the OPs idea.

johnrhansen
Posts: 1100
Joined: Mon Aug 12, 2013 7:23 pm
Delivery Date: 15 Jun 2013
Leaf Number: 409445
Location: Seattle, WA

Re: put the condenser for defrost mode inside the car.

Sun Mar 23, 2014 1:00 am

Lb I agree with you. Fresh air should continue to enter the car as it does now. Just run it across the condenser first. I was thinking about it again, and I think the easiest way to do it is leave the condenser outside the car drawing cold air, but draw it from up high away from road moisture. Make it a sealed unit so that its exhaust air could go into the fresh air port in the winter, and rejected outside during the summer. The freah air intake is also selectable. The condenser outlet in the winter, and a second fresh air port in the summer. Then your head pressures and compressor load is not changed either. The only difference is the resistance heater isn't drawing as much power to replace the heat lost over the evaporator coils.
2013 S model with quick charge package.
AV 30 amp level 2 EVSE, Bosch PowerMax 30 Amp EVSE, EVSE upgraded EVSE.

User avatar
Nubo
Posts: 4418
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: put the condenser for defrost mode inside the car.

Mon Mar 24, 2014 11:36 am

LeftieBiker wrote:Miss Piggy misunderstands. I'm not arguing that the condenser placement would be a problem, I'm saying that moisture will build up in the cabin in Winter in *either* case, if fresh air is excluded.


This was not proposed. As I understood it, "recirculates cabin air through both the condenser and the evaporator" in the OP, was simply referring to the condenser and evaporator being in the same airspace. It wasn't necessarily a proposal to exclude outside air (a.k.a. "recirculate mode"). Condenser placement and recirculate mode aren't mutually exclusive.
I noticed you're still working with polymers.

Levenkay
Posts: 426
Joined: Mon Sep 26, 2011 10:01 pm
Delivery Date: 16 May 2013
Leaf Number: 19196
Location: Portland, OR

Re: put the condenser for defrost mode inside the car.

Mon Mar 24, 2014 1:17 pm

In my simplistic view, the only thing wrong with the cabin air (neglecting oxygen depletion) is the buildup of exhaled moisture. If you mechanically remove that moisture (by running the cabin air over a cooling "expansion" coil, allow the condensed water to run off & exit the cabin, then heat the dried air back up again by allowing it to run over the heating "compression" coils, how is that not better, energy-wise, than having to constantly heat a steady flow of cold external air up to the desired cabin temperature?

dsny
Posts: 22
Joined: Fri Dec 05, 2014 3:49 am
Delivery Date: 18 Dec 2014
Location: Ithaca, NY

Re: put the condenser for defrost mode inside the car.

Tue Jan 13, 2015 3:33 am

What about a cheap portable 120vac plug-in or battery-operated air conditioning unit, or heat pump?

Or speaking of exhaled breath: what about a full body suit to trap body moisture? This would be in the style of the stillsuit of course (i.e., full body suits that hydrate for life on Dune, a desert planet). This has been invented, right?

Would not bring up the Dune suit except that of course this is the kind of tech. that you expect to be showing up nowadays. Something like... [fumbles around in the couch pillows]... the Subzero Warm Breath Mask? :P



Image
Coming Soon

BrockWI
Posts: 541
Joined: Fri Mar 28, 2014 6:28 am
Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

Re: put the condenser for defrost mode inside the car.

Tue Jan 13, 2015 6:58 am

Basically moving everything "inside" would be like running a traditional dehumidifier. I wonder how well it could keep up with the humidity in the air.

Got me to thinking of throwing a 120vac dehumidifier in the back with a 2kw inverter and a big 8D battery to find out :)
3 kw solar pv - XW6048 - 8 L16's
4 ton GSHP
2003 VW TDI 170k miles - 52 mpg lifetime
evse level 2 - Clipper Creek HSC-40
2013 S model with QC package Mar of 2013

dsny
Posts: 22
Joined: Fri Dec 05, 2014 3:49 am
Delivery Date: 18 Dec 2014
Location: Ithaca, NY

Re: put the condenser for defrost mode inside the car.

Tue Jan 13, 2015 1:35 pm

BrockWI wrote:Basically moving everything "inside" would be like running a traditional dehumidifier. I wonder how well it could keep up with the humidity in the air.

Got me to thinking of throwing a 120vac dehumidifier in the back with a 2kw inverter and a big 8D battery to find out :)


Yes. About the dehumidifier though. It seems the "operating temperature" of dehumidifiers is typically somewhat limited. E.g this dehumidifer:

"Temperature operating range: 5 - 32 °C"
Image
https://www.amazon.co.uk/dp/B0026P6OMA/

Is this true? Will the dehumidifier pull out water below 5C? Or is it that in situations where it is below 0C outside the cabin would get above 5C quickly enough through the heater use?
Coming Soon

jkwilborn
Posts: 2
Joined: Tue Jul 08, 2014 3:12 am
Delivery Date: 07 Apr 2014

Re: put the condenser for defrost mode inside the car.

Tue Jun 23, 2015 2:48 pm

It's always interesting to note how some people always come up with ways that would hurt operation in other areas. Of course living in the SW Deserts we commonly hit 80 deg and above at end of March or at least by April and we start seeing 100 deg weather that lasts until beginning of October. Even the winters here are very mild compared to many parts of the country.

Return to “Suggestions for Nissan”