How hot was your truck or trailer

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edwmax
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Re:How hot was your truck or trailer 2011/08/05 13:29:55 (permalink)
Schmelly

Can an A/C unit actually keep a truck or trailer cool at all ?

Not really.    ... The only hope is to bring in makeup air for the hood blowing down along the full length at the front (air curtain). In and out at the hood.   Look at hoods with makeup supply air. ... The makeup supply air to be about 85% (maybe 90%) of the hood exhaust air.    ... Then vent the heat off other appliances to the outside as discussed above; use outside makeup air where and if possible.   ... Now size the AC for the truck/trailer plus the number of people, heat of appliances not vented, and intake air not supplied by makeup supply systems.
 
Est. per 1000 CFM Outside air flow to be cooled, not including high humidity and other heat loads of the kitchen,  outside air only:
       ***30 deg difference (100 deg cooled to 70)= 2.7 tons AC/per 1000 CFM
        ***20 deg difference (100 cooled to 80)=1.8 tons AC/per 1000 CFM
The calculation is not quit this simple, but shows why concession trucks & trailers with the air flow CFM reportedly used by the exhaust hoods (200 cfm per ft) can not be cooled.  You need a 5 ton AC or larger to begin with, running continuously if the exhaust hood air is included.
post edited by edwmax - 2011/08/05 15:42:47
#31
Dr of BBQ
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Re:How hot was your truck or trailer 2011/08/05 15:53:12 (permalink)
lornaschinske

There has to be a way to lessen the heat. How can you guys work like that?  I can't believe no one has figured out a solution to this.

 
The short and truthful answer is there is no way to really cool a mobile kitchen. Most restaurant's BOH is hot but not as bad as a mobile unit. It's always going to be hot.....but from Dec 1st to late March it's a blessing. LOL
#32
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Re:How hot was your truck or trailer 2011/08/07 20:57:35 (permalink)
What about sticking a large 220 volt wall mount a/c unit in your trailer ?
 
Wouldn't cranking a big unit like that on full blast help keep things cool ?
#33
Dr of BBQ
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Re:How hot was your truck or trailer 2011/08/07 22:22:45 (permalink)
Schmelly What about sticking a large 220 volt wall mount a/c unit in your trailer ?
Wouldn't cranking a big unit like that on full blast help keep things cool ?

 
The problem remains the same your sucking a tremendous amount of cool air out of the unit with the exhaust fan. So you could install a 440 volt air conditioner or a 3 phase 2 000 gigs monster air conditioner, and you'd still suck a lot of the cool air out of the truck or trailer. It's just going to be a very hot work place and you suffer through it. There is not a great way or even decent way to cool a 7 feet by 18 or 20 foot room with all that heat producing equipment in it.
 
Think about it like this: put 3 or 4 household kitchen stoves in the same size ( your kitchen or bedroom what ever) space and turn them on both oven and stove top  full blast and your home air conditioner could never cool that space/room. It would run non stop all day and maybe make a slight dent in the temp. And it's funny we all worry about insulating trailers (mine is) and trucks, and all the insulation does is keep the heat in during the summer. LOL The insulation helps in the winter months but not during the hot summer months.
post edited by Dr of BBQ - 2011/08/07 22:29:18
#34
Rootsman
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Re:How hot was your truck or trailer 2011/08/10 20:45:34 (permalink)
I can tell you my undercounter True fridge throws off more heat than the steam tables.  Looking to install a small extraction fan by the fridge.
#35
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Re:How hot was your truck or trailer 2011/08/11 02:52:19 (permalink)
Rootsman, what you need to do is vent the exhaust air from the fridge unit out the side or bottom of the truck.....
the unit itself isnt really producing any heat, its the exhaust from the condensing coils....vent that out the side and i promise you will be very happy
dont just put a fan in near the unit, but actually vent from the point of exhaust out the side of the truck.... it will make a huge difference!!
 
and i still say an air curtain blowing in from outside(maybe a long duct set up at waist level right in front of the cooking area) blowing upwards, aimed at the throat of the vent hood, and blowing in about 95% of what the cfms are for the hood should help tremendously there as well....
post edited by BackAlleyBurger - 2011/08/11 02:53:54
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Re:How hot was your truck or trailer 2011/08/11 02:53:24 (permalink)
it wont stop all the radiant heat, but it should just about put an end to the convection, and soak up a large part of the radiant as well...
 
i am hoping to put 2 tons in my truck, sounds like a lot, but remember, a ton is only 12,000 btu 
 
and of course there are the tried and true staples.... park in shade if possible, keep the windshield pointing away from the sun if possible...... awning over serving window, heat reflective shades for the front glass if needed, heat reflective roofing..... the cooler your "ambient" air from the front of the truck, the easier on the unit it will be, and the cooler the back of the truck will be....
basically any outside sunshine(direct light) inside your truck, or beating down on your truck is adding heat.....
i believe it can be done, can be done somewhat cheaply, and can increase the livability 
post edited by BackAlleyBurger - 2011/08/11 03:57:15
#37
Schmelly
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Re:How hot was your truck or trailer 2011/08/11 05:12:02 (permalink)
Dr of BBQ

Schmelly What about sticking a large 220 volt wall mount a/c unit in your trailer ?
Wouldn't cranking a big unit like that on full blast help keep things cool ?


The problem remains the same your sucking a tremendous amount of cool air out of the unit with the exhaust fan. So you could install a 440 volt air conditioner or a 3 phase 2 000 gigs monster air conditioner, and you'd still suck a lot of the cool air out of the truck or trailer. It's just going to be a very hot work place and you suffer through it. There is not a great way or even decent way to cool a 7 feet by 18 or 20 foot room with all that heat producing equipment in it.

Think about it like this: put 3 or 4 household kitchen stoves in the same size ( your kitchen or bedroom what ever) space and turn them on both oven and stove top  full blast and your home air conditioner could never cool that space/room. It would run non stop all day and maybe make a slight dent in the temp. And it's funny we all worry about insulating trailers (mine is) and trucks, and all the insulation does is keep the heat in during the summer. LOL The insulation helps in the winter months but not during the hot summer months.

Hmmm....Well what do you think I should do ? Insulation or no insulation ? I have my trailer torn apart right now....I was going to insulate it.....I live in New England so we get hot 80s and even 90s sometimes in summer time...Yer we get freezing zero degree temps in the winter....
 
Also was thinking of painting my trailer 2-tone royal/navy blue...think this is OK ? or a no-no ?
#38
edwmax
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Re:How hot was your truck or trailer 2011/08/11 06:49:28 (permalink)
Insulate your trailer.  Take special care of the roof as it is the biggest heat gain from the sun.    ... The heat being referred to above is from equipment. Heat from those sources need to be directed to the outside rather than being drawn thought the trailer & work areas.
#39
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Re:How hot was your truck or trailer 2012/03/12 15:22:57 (permalink)
i fought the heat in an exposed kitchen in sit down rest. I had to glass in the kitchen in the summer so customers would stay. makeup air made all the difference in the world. it can be as easy as opening a window somewhere around the hood.
#40
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Re:How hot was your truck or trailer 2012/03/12 15:23:20 (permalink)
28 posts, ewweee!
#41
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Re:How hot was your truck or trailer 2012/06/27 10:57:21 (permalink)
Anyone here running multiple A/C units?
 
This might sound crazy, but would it be helpful to somehow duct the air from these roof-mounted units down to floor-level so that us operators get some cool air before it gets sucked out by the exhaust?
#42
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Re:How hot was your truck or trailer 2012/06/28 14:28:34 (permalink)
i found a new product at home depot that green homes are using for roofing material that is cdx with a aluminum product glued to it. it reflects the radiant heat. you couldnt stare at in in daylight, absolutly blinding.  i used this in the ceiling with 1/2" foam under it and than alum skin accross the rafters. ill post it in my build thread when i update it. this alone made a 20 degree difference in my 2 trucks side by side. amazing stuff and its so new lowes wont get it till next month. be sure to check it out on new builds.
#43
edwmax
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Re:How hot was your truck or trailer 2012/06/28 15:35:20 (permalink)
BigChoksHOTBUNS

Anyone here running multiple A/C units?

This might sound crazy, but would it be helpful to somehow duct the air from these roof-mounted units down to floor-level so that us operators get some cool air before it gets sucked out by the exhaust?

 
Called 'spot cooling'.   this is what many large kitchens do.   Locate vents at work stations so the cold/cool air will blow on the worker. Then be sucked out with the exhaust.  You don't need a large AC, just a steady flow of cool air.    ... Also, you might want to look at using a 'swamp cooler'.  Just lowering the outside 10 deg and with the large air flow in concession trailers on most days you would be ok.
#44
Dr of BBQ
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Re:How hot was your truck or trailer 2012/06/28 16:19:28 (permalink)
With a fan running moving the air around, the exhaust fan sucking outside air into the trailer and pushing it out, and two windows open on most days it's alright. Even days like yesterday with a high of 92. But on days like today with a high of 100 I didn't even, open.
#45
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Re:How hot was your truck or trailer 2012/06/28 16:35:26 (permalink)
110 in the truck today and the fryers weren't even on... BARF
 
#46
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Re:How hot was your truck or trailer 2012/06/28 17:59:46 (permalink)
62 and cloudy here today!
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Dr of BBQ
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Re:How hot was your truck or trailer 2012/06/28 18:02:39 (permalink)
Good for you chef
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Re:How hot was your truck or trailer 2012/06/28 18:29:43 (permalink)
100 inside, 100 outside, with the AC running and the griddle wasnt even turned on. cooking with pans. Also have a drop-down hood that traps the heat.  thought about serving shaved ice, but it would melt faster than I could serve it... " />
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edwmax
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Re:How hot was your truck or trailer 2012/06/28 18:42:50 (permalink)
Dr of BBQ

With a fan running moving the air around, the exhaust fan sucking outside air into the trailer and pushing it out, and two windows open on most days it's alright. Even days like yesterday with a high of 92. But on days like today with a high of 100 I didn't even, open.

.... ha ... I bet your regular customers were inside under an AC eating.  ... No need to open.
#50
Dr of BBQ
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Re:How hot was your truck or trailer 2012/06/28 19:17:14 (permalink)
Yup business drops on days like this. It's just too hot to eat a heavy meal. When I finally left the house today it felt like a blast furnace when I walked outside.
 
What must it be like fighting that fire in Colorado Springs? Denver has had 4 or 5 straight days of 100 degree weather. I can't imagine wearing all that gear in that kind of heat.
#51
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Re:How hot was your truck or trailer 2012/06/29 09:40:46 (permalink)
anyone consider those mobile air conditioners that roll around on wheels? seen them in automotive shops and look pretty trick. all thats needed is a seat mounted, laughing
#52
roadkillgrill
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Re:How hot was your truck or trailer 2012/06/29 10:38:29 (permalink)
well you know it's hot when I stay dry-docked on the 1st of the month, especially when both 1st & 3rd checks come out today...
 
Lorna, I have that, but it's a balancing act to keep from drawing too much heat out. I also 3" exhaust (computer) fan behind the refrig. also a front cover completely surrounding the stove. This type of weather, the griddle top comes off and I use aluminum skillets because they heat in seconds.  If the customers are there, I will be there no matter what. But when it's this hot, they just dont come out. 
#53
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Re:How hot was your truck or trailer 2012/06/29 11:58:32 (permalink)
how many guys do this every day as a j-o-b and how many do it on the weekends or just festivals?  just wondering cause some just cant take the day off and hang by the pool...
#54
roadkillgrill
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Re:How hot was your truck or trailer 2012/06/29 12:33:34 (permalink)
4 day daily route (50wks) plus 40 weekend events spring and fall. I have no life... 
 
#55
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Re:How hot was your truck or trailer 2012/06/29 14:23:33 (permalink)
We are open 5 days a week year round, but when it's stupid hot or outrageously cold I don't open. But today was forecast to be slightly cooler 95 to 97 and so I did open. But now they say afternoon high 106 "feels like 112" and here I am. If I didn't have a special order going out at 4:00 I'd close. But now I'll stick it out drinking lots of grape kool aid. LMAO
#56
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Re:How hot was your truck or trailer 2012/06/29 15:18:31 (permalink)
Dr of BBQ

We are open 5 days a week year round, but when it's stupid hot or outrageously cold I don't open. But today was forecast to be slightly cooler 95 to 97 and so I did open. But now they say afternoon high 106 "feels like 112" and here I am. If I didn't have a special order going out at 4:00 I'd close. But now I'll stick it out drinking lots of grape kool aid. LMAO

MMmmmmmm.....Grape Kool-Aid, with ice & Vodka! thats what I use a few nights a week to cool me off! The kids like the Punch, but im partial to the Grape
#57
Dr of BBQ
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Re:How hot was your truck or trailer 2012/06/29 15:38:09 (permalink)
LOL never thought of that. Do the kids forgo the adult part?
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Re:How hot was your truck or trailer 2012/06/29 19:00:25 (permalink)
oh yeah, 107 today & 120 in the truck. I closed at 1pm. I didn't hydrate before going out and didn't eat either. Ended up having my first food at 1230. I was wiped out and hurting today... I couldn't take any more
 
#59
Dr of BBQ
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Re:How hot was your truck or trailer 2012/06/29 19:04:16 (permalink)
The asphalt right in front of my drive up window at 3:30 read 138.
The hottest corner in the trailer was 112. I had a good day but god it wore me out. Not looking forward to tomorrow, it's supposed to be a repeat of today. But I still like this better than the days with a high of 12 or 13.
 
Wow look at this:
Norton Dam, Kan., recorded an all-time record of 118 degrees F. on Thursday, two degrees above Death Valley's July average. The 118-degree reading shattered Norton Dam's previous record of 113 degrees F. – set just three days before.
 
Anyone looking for relief might put the Northwest on their itinerary. Over the same two-day period, 57 locations, largely clustered in Washington state and northeastern Oregon, posted at least one daily high temperature that tied or beat the lowest for the date on which it was measured. Waterville, Wash., posted the biggest drop among the group – a high of 51 degrees on Wednesday, nine degrees below the previous record-low high of 60 degrees on June 27, 1946.
 
And it's all coming out of a spring that was the warmest on record in the US, bringing a heat wave to the center of the country in March the likes of which the US hasn't seen since 1910. Indeed, Spring 2012 in the US was 2 degrees warmer than the previous record-holder, the spring of 1910.
 
One reason for the seemingly relentless high temperatures is the presence of a broad ridge of high pressure inching its way across the continent, forecasters say. With skies generally clear, sunlight has a clear path to travel on its way to baking what in many places is an already parched surface.
 
As of Tuesday, a broad swath of the US was experiencing either severe or extreme drought, according to the National Drought Mitigation Center, based at the University of Nebraska in Lincoln.
 
More here;http://www.csmonitor.com/...end-of-June-got-so-hot
post edited by Dr of BBQ - 2012/06/29 21:04:04
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