HVAC FORMULA’S AND CONVERSIONS PDF FILE
HVAC FORMULAS::
TON OF REFRIGERATION – The amount of heat required to melt
a ton (2000 lbs.) of ice at 32°F
288,000 BTU/24 hr.
12,000 BTU/hr.
APPROXIMATELY 2 inches in Hg. (mercury) = 1 psi
WORK = Force (energy exerted) X Distance
Example: A 150 lb. man climbs a flight of stairs 100 ft.
high
Work = 150 lb. X 100 ft.
Work = 15,000 ft.-lb.
ONE HORSEPOWER = 33,000 ft.-lb. of work in 1 minute
ONE HORSEPOWER = 746 Watts
CONVERTING KW to BTU:
1 KW = 3413 BTU’s
Example: A 20 KW heater (20 KW X 3413 BTU/KW = 68,260 BTU’s
CONVERTING BTU to KW:
3413 BTU’s = 1 KW
Example: A 100,000 BTU/hr. oil or gas furnace
(100,000 ÷ 3413 = 29.3 KW)
HVAC FORMULA’S AND CONVERSIONS PDF FILE
COULOMB = 6.24 X 1018 (1 Coulomb = 1 Amp)
E = voltage (emf)
I = Amperage (current)
R = Resistance (load)
WATTS (POWER) = volts x amps or P = E x I
P(in KW) = E x I
1,000
U FACTOR = reciprocal of R factor
Example:
1 R = .05U
19
= BTU’s transferred / 1 Sq.Ft. / 1ºF / 1 Hour
You may also like👇
- ARAMCO :: CBT QA/QC – Instrumentation Inspector Qualification Guideline
- PIPING Inspector Qualification Guideline Vol-2
- Saudi Aramco Cbt Exam Questions and Answers
- CBT EXAM E-BOOKS
- QA/QC ELECTRICAL Inspector Question & Answer Handbooks
- QA/QC E-books Category
- WELDING PROCEDURES (WPS) Neptune Energy Netherlands
- What is Pipe Rack?
- Five Types of concrete used in construction
- METHOD STATEMENT FOR METAL AND WOODEN DOORS || Aramco
LCAR provide Professional appliance repair services in Chicago have highly trained technicians who specialize in working with various types of appliances such as refrigerators, ovens, dishwashers, washing machines and dryers