Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 6th October 2009, 10:28   #1
BHPian
 
reddy6980's Avatar
 
Join Date: Sep 2005
Location: bangalore
Posts: 136
Thanked: 8 Times
Default Rooftop A/c's

I have seen many rooftop a/c's in vehicles like Force traveler.
Now the question, do these A/c's run on compressors connected to the engine or do they run on batteries.
What is the cost of such a/c's.
reddy6980 is offline   Reply With Quote
Old 6th October 2009, 11:02   #2
Senior - BHPian
 
gigy's Avatar
 
Join Date: Jul 2006
Location: mumbai
Posts: 1,321
Thanked: 41 Times
Default

Even i am looking for information on such thing for omni.
gigy is offline   Reply With Quote
Old 6th October 2009, 23:32   #3
BHPian
 
Join Date: Apr 2008
Location: Bangalore
Posts: 366
Thanked: Once
Default

all vehicle ACs work off the engine AFAIK.
silver_shadow is offline   Reply With Quote
Old 7th October 2009, 00:05   #4
BHPian
 
Join Date: Dec 2008
Location: Delhi
Posts: 269
Thanked: 9 Times
Default

Quote:
Originally Posted by silver_shadow View Post
all vehicle ACs work off the engine AFAIK.
Unable to understand what do you mean. All ACs depend on the engine to work (compressor is connected with a belt called AC Belt to the engine). Have heard in some buses etc there is a special generator to drive the AC but I guess the Force ACs work with the engine only.
WanderNomad is offline   Reply With Quote
Old 7th October 2009, 08:50   #5
BHPian
 
honda3938's Avatar
 
Join Date: Aug 2009
Location: patiala
Posts: 125
Thanked: 0 Times
Default

The roof mounted blower has cooling coils and blower . The cooling coils are connected to the compressor and blower to battery . The are similar to in dash ac but are roof mounted to give better cooling at rear.
honda3938 is offline   Reply With Quote
Old 7th October 2009, 09:08   #6
Senior - BHPian
 
Join Date: Jul 2008
Location: Bangalore
Posts: 2,031
Thanked: 381 Times
Default

Guys he is not asking about roof mounted coils and blower as in Tata Safari , In commercial vehicles like AC Buses and Tempo traveler full AC unit including compressor is mounted either in rear or on roof top ( in case of traveler)

As far as I know a separate engine is used to drive this Auxillary AC unit and it is not driven from Vehicle engine as the AC load for a bus / mini bus would be huge on the main engine.
Driving using battery is also futile because battery is actually charged by Alternator which again means same load on engine + Conversion losses

Usually on traveler these AC are of Carrier make but I have no idea about the cost.
amitk26 is online now   Reply With Quote
Old 7th October 2009, 09:34   #7
Senior - BHPian
 
Join Date: Sep 2007
Location: New Delhi
Posts: 3,083
Thanked: 252 Times
Default

Quote:
Originally Posted by reddy6980 View Post
I have seen many rooftop a/c's in vehicles like Force traveler.
Now the question, do these A/c's run on compressors connected to the engine or do they run on batteries.
What is the cost of such a/c's.
All that is mounted on the rooftop is the condenser and a fan. The compressor stays in the engine bay.
On large buses a separate engine-driven compressor is used and the engine + compressor + condenser assembly is roof mounted.
anupmathur is offline   Reply With Quote
Old 7th October 2009, 09:34   #8
BHPian
 
reddy6980's Avatar
 
Join Date: Sep 2005
Location: bangalore
Posts: 136
Thanked: 8 Times
Default

In Force site they have mentioned that the AC's used are of Subros make.
reddy6980 is offline   Reply With Quote
Old 7th October 2009, 14:58   #9
BANNED
 
Join Date: Nov 2008
Location: New Delhi
Posts: 690
Thanked: 152 Times
Infractions: 0/1 (5)
Default

I asked for a quote for such ac from a company in faridabad. If i remember correctly it was sidwal and the quote i got was around 80,000 Rs .This inlcudes everythin for the ac and installation.And this was the smallest ac they have.
Now for what i was looking you guys will not believe , i thought to make the ac of 800 more effective .
LOL
Trust_In_Thrust is offline   Reply With Quote
Old 7th October 2009, 15:12   #10
BHPian
 
honda3938's Avatar
 
Join Date: Aug 2009
Location: patiala
Posts: 125
Thanked: 0 Times
Default

Quote:
Originally Posted by Trust_In_Thrust View Post
I asked for a quote for such ac from a company in faridabad. If i remember correctly it was sidwal and the quote i got was around 80,000 Rs .This inlcudes everythin for the ac and installation.And this was the smallest ac they have.
Now for what i was looking you guys will not believe , i thought to make the ac of 800 more effective .
LOL
i am unable to understand whether you want the ac for traveller or for maruti 800?
honda3938 is offline   Reply With Quote
Old 7th October 2009, 15:47   #11
BANNED
 
Join Date: Nov 2008
Location: New Delhi
Posts: 690
Thanked: 152 Times
Infractions: 0/1 (5)
Default

^ These ac that are mounted on roof top come sin various sizes . I chose the smallest for the M800 but was not cost effective .
Now dont' embarrass me again saying you want to install this in M800.I know i was insane.
But now i have a new design in mind for the 800.

Last edited by Trust_In_Thrust : 7th October 2009 at 15:51.
Trust_In_Thrust is offline   Reply With Quote
Old 7th October 2009, 16:38   #12
BHPian
 
Takumi-san's Avatar
 
Join Date: Apr 2009
Location: Melbourne
Posts: 364
Thanked: 3 Times
Default

Ok,I cant let this go.

MARUTI 800 MATE ? ARE YOU SERIOUS!

hehe, fine I wont push it.
Takumi-san is offline   Reply With Quote
Old 7th October 2009, 17:49   #13
BHPian
 
Join Date: Apr 2008
Location: Bangalore
Posts: 366
Thanked: Once
Default

someone told me about a little fan that you can fit on the roof between the passenger seats and driver seat which will channel some of the AC air towards the back. supposedly it's quite effective. instead of looking at roof mounted ACs which will cost almost as much as the car and add to it's instability you might want to try the fan which is alot cheaper!
silver_shadow is offline   Reply With Quote
Old 7th October 2009, 21:36   #14
Senior - BHPian
 
Join Date: Sep 2007
Location: New Delhi
Posts: 3,083
Thanked: 252 Times
Default

Quote:
Originally Posted by Trust_In_Thrust View Post
....
Now for what i was looking you guys will not believe , i thought to make the ac of 800 more effective .
LOL
I would not consider you totally insane!
If you were to shift the condenser of the existing AC to the roof at a 30 degree rake, you'll find quite an improvement! There will have to be a fan with the condenser too, for the times you are not moving at speed. Can be a manually controlled fan, with a switch at the dashboard.
anupmathur is offline   Reply With Quote
Old 8th October 2009, 01:38   #15
BANNED
 
Join Date: Jun 2007
Location: Noida
Posts: 612
Thanked: 10 Times
Default

Quote:
Originally Posted by silver_shadow View Post
someone told me about a little fan that you can fit on the roof between the passenger seats and driver seat which will channel some of the AC air towards the back. supposedly it's quite effective. instead of looking at roof mounted ACs which will cost almost as much as the car and add to it's instability you might want to try the fan which is alot cheaper!
well, a few years back i used to travel in BPO cabs a lot. they were either tavera, sumo or a qualis.

I have seen two type of these AC's -

one kind are the two little boxes that have a cylindrical fan in them that circulate the cool air towards the rear, very effective for the price i would say..

The other ones i have seen are just like the one in the safari, they fit very neatly, chill like crazy and they have their own condenser pipes and everything. i presume the have another compressor as well as these things cost around 25-30K
saintsinner is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT +5.5. The time now is 20:56.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks