Air Conditioner Sizing
This articles talks about air conditioner sizing, using psychrometric drawing, comfort, and duct sizing charts, in exchange with Instruction J. General checklist is provided for the process.
AC sizing is a long topic, and hence I have in need the articles curiosity two parts.
The head part of this article talked about the fundamentals and concept of AC sizing, sizing using alibi feet method and Manual J.
Part II of air conditioner sizing will natter about the integration of three different charts, and Manual J, in AC sizing. We ' ll begin it now.
Comfort, Psychrometric and Duct Sizing Charts ' Use in AC Sizing
This method of air conditioner sizing is exceeding chock-full than using Guide J alone, and substantial is especially useful in sizing for central air conditioning units - setting you ' ll have multifarious rooms to arctic, with fresh air intake from outside.
Here ' s the checklist for AC sizing using this arrangement:
use comfort chart, to set the desired indoor conditions.
Comfort chart that was formulated by ASHRAE, and shows a range of all comfort levels for human being. The comfort levels are provided in terms of humidity, and temperature.Next, Manual J is used to find out the sensible, and latent heat advancement and loss in each room within a desired building.
Room slope will be assigned for all chambers, individually. It is carried out by separation seemly heat, to total heat ( sensible, plus latent heat ) now, psychrometric chart is to be used. This chart, will ultimately determine the minimum air conditioner size for your construction.
The size is on ice by finding outmost the attached values, mass dart rate of air into each room, further air to recirculated air dependence and ultimately, the air conditioner size from cooling load value. Data that you will need work in, the volumetric air requirement per person, of 5 litres / entity / compartment / second, outside, and inside temperature and humidity, and room slope values.Dducts consign be the forthcoming item to be sized, because it needs clue of air mass flow rate. Duct sizing charts need to be used for this, with prior word of maximum air draft at design condition, and duct resistance values. The checklist superior will help you in performing air conditioner sizing, using psychrometric, duct sizing, and comfort charts.
It is quite an extensive process, but worth the attempt for central air conditioner sizing.
