Author Topic: Your air conditioner  (Read 9740 times)
wattMaster
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Re: Your air conditioner « Reply #45 on: June 09, 2016, 07:35:38 PM » Author: wattMaster
Central not enough that is because they did not choose it right in the 1st place. Maybe they did not take into account the heat of some of the sources, or maybe the use of the building was changed (for example : shop changed to restaurant so kitchen heat added) after the unit was installed
But even with all of the air conditioning, It still feels really hot in there.
And this has been a restaurant for a long time, So maybe they skimped on air conditioning to save money.
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Ash
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Re: Your air conditioner « Reply #46 on: June 09, 2016, 08:37:11 PM » Author: Ash
Then wasted 3x more on additional units..

It is hot even with air conditioning if there is big time heat leaking in - Window letting in sunlight ? Bad insulation ?

And it defintely is hot outside, near where the outdoor unit blows, as that is where all the heat from indoors is extracted to. Those should be positioned so that they blow the heat away into open area, but in reailty i seen them being installed in ways so that they blow the air into the inner space of false walls, into other indoor rooms, into basements and underrground car parks, into other windows in front of the wall, into each other, and so on..
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Re: Your air conditioner « Reply #47 on: June 09, 2016, 09:36:59 PM » Author: wattMaster
Then wasted 3x more on additional units..

It is hot even with air conditioning if there is big time heat leaking in - Window letting in sunlight ? Bad insulation ?

And it defintely is hot outside, near where the outdoor unit blows, as that is where all the heat from indoors is extracted to. Those should be positioned so that they blow the heat away into open area, but in reailty i seen them being installed in ways so that they blow the air into the inner space of false walls, into other indoor rooms, into basements and underrground car parks, into other windows in front of the wall, into each other, and so on..
I think it is because of the hot climate and that there at least 30 people at one time in there.
Another possible reason for the heat is because of all of the refrigerators they have there.
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Re: Your air conditioner « Reply #48 on: June 10, 2016, 06:38:02 AM » Author: Ash
Hot climate and people are not excuse. Whoever is responsible for choosing the unit, is well aware that it is going to be installed in Florida in a place with 30 peeps inside

Big refrigerators (supermarket type) when installed properly, their condenser coils are outside, so the heat is not emitted inside the building. Then they actually aid in cooling down the place, as the only effect indoors is cold air from the fridges
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Re: Your air conditioner « Reply #49 on: June 10, 2016, 07:15:03 AM » Author: wattMaster
Hot climate and people are not excuse. Whoever is responsible for choosing the unit, is well aware that it is going to be installed in Florida in a place with 30 peeps inside

Big refrigerators (supermarket type) when installed properly, their condenser coils are outside, so the heat is not emitted inside the building. Then they actually aid in cooling down the place, as the only effect indoors is cold air from the fridges
I always thought that the coils were inside because transporting the refrigerant long distances would be inefficient .
But I'm still baffled why it is so hot in there.
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Re: Your air conditioner « Reply #50 on: June 13, 2016, 03:01:00 PM » Author: Medved
I always thought that the coils were inside because transporting the refrigerant long distances would be inefficient .

Actually the refrigerant does not travel long distances at all, usually there is used an intermediate medium to transfer the heat from the condensers to the outside. Most frequently just water circuit for cooling (circulating through the cooling towers on the roof or so), which is used not only by the refrigerators, but sometimes the AC units as well. It allows to make the individual heating and cooling modes very easily independent, moreover even utilizing the waste heat from one part for heating another, so really cuts down the energy need for all the heat management.

Some installations have even the big machinery outside and just a cold water (with an antifreeze agent in it) is then lead around the sitre to deliver the "cold" to places where needed. This is usually done on installations, where the cooled things have similar target temperature, so the most common are large building AC, refrigerated storage facilities, ice sport stadiums,...
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Re: Your air conditioner « Reply #51 on: June 13, 2016, 03:58:17 PM » Author: wattMaster
I always thought that the coils were inside because transporting the refrigerant long distances would be inefficient .

Actually the refrigerant does not travel long distances at all, usually there is used an intermediate medium to transfer the heat from the condensers to the outside. Most frequently just water circuit for cooling (circulating through the cooling towers on the roof or so), which is used not only by the refrigerators, but sometimes the AC units as well. It allows to make the individual heating and cooling modes very easily independent, moreover even utilizing the waste heat from one part for heating another, so really cuts down the energy need for all the heat management.

Some installations have even the big machinery outside and just a cold water (with an antifreeze agent in it) is then lead around the sitre to deliver the "cold" to places where needed. This is usually done on installations, where the cooled things have similar target temperature, so the most common are large building AC, refrigerated storage facilities, ice sport stadiums,...
Oh, a chilled loop...
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Re: Your air conditioner « Reply #52 on: June 15, 2016, 10:04:26 PM » Author: mdcastle
Living in the suburbs of Minneapolis we have an electric central air conditioner and a gas forced air furnace, the typical combination for all new houses here. Older houses in the inner city might have hot water or steam radiators or gravity furnaces and rely on window air conditioners.

Older apartments tend to have hot water heat and window air conditioners (heat is supplied as part of the rent but air conditioning is not), newer ones will have a "Magic Pack" combination unit.
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Re: Your air conditioner « Reply #53 on: June 16, 2016, 08:53:23 AM » Author: wattMaster
Living in the suburbs of Minneapolis we have an electric central air conditioner and a gas forced air furnace, the typical combination for all new houses here. Older houses in the inner city might have hot water or steam radiators or gravity furnaces and rely on window air conditioners.

Older apartments tend to have hot water heat and window air conditioners (heat is supplied as part of the rent but air conditioning is not), newer ones will have a "Magic Pack" combination unit.
We only use heat for a couple of days where Florida is superbly cold enough to not warrant air conditioning.
We also don't have anything related to gas, just electric. (I'm talking about utility natural gas)
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