Importance of the Heat Load Calculations - Part 2

Written by:  • Edited by: Lamar Stonecypher
Published Nov 27, 2008

The importance of the heat load calculations can be understood from the fact that right from the designing of the building itself, the HVAC designer works closely with the building architect to making recommendations for the locations of the various air-conditioning systems of suitable sizes.

Importance of Heat Load Calculations

Let us continue with the importance of heat load calculations:

4) Deciding the location of the indoor unit and the outdoor unit: In most of the large buildings split, packaged or central air-conditioning systems are installed. In such cases the location of the indoor unit is very important. The indoor unit comprises of the cooling coil or the evaporator coil that produces the cooling effect inside the room. After the heat load calculations depending on the load heat load inside the room and purpose of the room, the location of the indoor unit can be decided. It can be located at the top, which is called ceiling mounted indoor unit or it can be kept on the floor which is called floor mounted indoor unit. The location of the outdoor unit greatly depends on the location of the indoor unit.

5) Laying ducts: Another important aspect of the air-conditioning systems for large applications like large buildings, theaters, cinema halls, air-ports etc is laying the ducts. The ducts carry the cool air from air-conditioning system to the room and they also circulate or throw the hot room air. The ducts are usually installed at the top of the roof and are covered by the false ceiling. The ducts should be laid during the construction of the room or the building itself. If they are not laid during the construction of the building large scale destruction will have to be done in the room and in some cases one may not even be able to lay the ducts if the work on the building is done. Laying the ducts during construction of the building is vital.

For this it is important that the size and layout of the ducting should be known and this is possible if the size of the air-conditioning system to be installed inside the room is known. Only after carrying out the heat load calculations the type of the AC system for the room and the size and layout of the duct required for the room or hall can be found out.

Apart from these, a number of other factors and dimensions related to the air-conditioning systems are also decided only after the heat load calculations. The heat load calculations done correctly will help you make the optimum use of your air-conditioning systems for the years to come.


Comments

Showing all 12 comments
 
Anil Kumar Feb 10, 2011 12:13 AM
Heat load calculation
Sir, Actually my air conditioning aria is 1450 sft . Tube lights are 20 nos,seating 50 Nos, With PC , No windows and Other sources of heat
TAHIR MOIZ Dec 25, 2010 11:52 AM
cooling load calculation formula
hi i am working in distec cooling system carporation i have 35000TR cooling plant we have conected 20 buildings.i need cooling load calculation formula,can you help me.thanks
gowtham Dec 21, 2010 1:20 AM
heat load calculation article
plz give me heatload calculation
arshad ali Nov 28, 2010 12:52 PM
HVAC load calculation formula
sir
i wanted to desine weaving mill 50 loom shead please send me hvac desine formula
best regards
arshad ali
Pragyanand Oct 2, 2010 11:31 AM
R-Value
Dear sir ,

Can you give me various r-value for differnt type of walls & pls tell me how to select factor for duct heat loss & gain & fan etc, in the heat load sheet.
Pragyanand Oct 2, 2010 11:28 AM
reagardid heat load
Dear Sir,
in the heat load calculation, Plz tell me about the factor 0.68 & 1.08 i.e latent & sensible heat ? & please tell me hoe to select the temperature diffecence for partion & ceiling, glass & floor & same for the wall in case of winter.
Elangovan Aug 16, 2010 2:28 AM
HVAC Calculation
thanks for your article. could you pls. send me formula and procedure of cooling load and sizing of hvac duct works.
zubair Mar 3, 2010 9:02 AM
detail abt hvac
Respected sir, can u plz give detail abt hvac n how to calculate the heat load with formula.
Haresh Khemani Dec 16, 2009 5:35 AM
Cooling load calculations formula
I have posted a separate series of articles on procedure for residential heat load calculations. Its available here: http://www.brighthub.com/engineering/mechanical/articles/52621.aspx
abdur razzak akhond Dec 16, 2009 2:31 AM
cooling load calculation formula
thanks for your article. could you pls. send me formula and procedure of cooling load and sizing of hvac duct works.
abdur razzak akhond Dec 16, 2009 2:27 AM
cooling load calculation formula
Thanks for your article. could you pls send me the formoula for calculate the heat load of hvac and sizing procedure of duct work.
Baiba Pillai Jul 6, 2009 8:24 AM
heat load calculation article
Thank you, Haresh! Keep up the good work
 
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