ការគណនាផ្ទៃបន្ទប់ត្រូវនឹងខ្នាតម៉ាស៊ីនត្រជាក់

Ok..this time i want share the simple basic of calculation how to sizing the air-conditioner.This is a critical part to ensure our selection is suitable with our requirement for room or any space that we want to cooling.

We must calculate the total heat for that room in unit Btu/hr.From this we can convert Btu/hr to air-conditioner size in horse power ( Hp ).We can estimate the size depend on horse power ( hp ).

Total heat calculation ( Btu/hr ) :

1) Measure your room or space area ( width x length ).Use a metric unit for measurement ( meter ).Multiply with 700 to get in Btu/hr

Example : Room area = 10 meter x 6 meter = 60 m2

Btu/hr = 60 x 700 = 42,000 Btu/hr

2) Estimate occupant for this room.multiply with 500 to get in Btu/hr

Example : 5 peoples x 500 = 2500 Btu/hr

3) Estimate the heat from electrical equipments such as lighting,television,computer,fax machine,radio or etc.Refer wattage for equipment and multiply with 3.5

Example : TV = 100 watt, Computer : 200 watt, lighting : 150 watt ; Total : 450 watt

so 450 watt x 3.5 = 1575 Btu/hr

4) So we add all answer to get a total Btu/hr.

Example : 42,000 Btu/hr + 2,500 Btu/hr + 1,575 Btu/hr = 46,075 Btu/hr

5) To get air-conditioner sizing, we must divide Total heat ( Btu/hr) with 9800 Btu/hr

* This value is depend on cooling capacity for each air-conditioner due to efficiency of compressor.It maybe 9,800 btu/hr,10,000 btu/hr or 12,000 btu/hr

Example : 46,075 / 9800 = 4.7 hp

6) From this answer we can estimate to choose a 5 Hp of air-conditioner for our room.

If you not sure to calculate air-conditioner size for your room,Please contact your local HVAC expert and the will calculate and advice the suitable size and types of air-conditioner for you.

This calculation is just for estimation value.It not absolute answer for your air-conditioner sizing.You can make a comparison your estimate air-conditioner size with your local HVAC expert.I hope this information

can help all of you how to sizing the air-conditioner to avoid unnecessary cost.

- See more at: http://www.electricneutron.com/air-condition/air-conditioner-sizing/#sthash.JaoOFu6R.dpuf