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Psychrometric Chart The Psychrometric Chart provides a graphic relationship of the state or condition of the air at any particular time. It displays the properties of air: dry bulb temperature (vertical lines), wet bulb temperature (lines sloping gently downward to the right), dew point
Specific Heat Ratio of air at temperatures ranging -40 - 1000 degC (-40 - 1500 degF) at standard atmospheric pressure - Imperial and SI Units.
Ideal-gas specific heats of various common gases (a) At 300 K Gas constant, Rc p c v Gas Formula kJ/kg·K kJ/kg·K kJ/kg·K k Air — 0.2870 1.005 0.718 1.400 Argon Ar 0.2081 0.5203 0.3122 1.667 Butane C 4H 10 0.1433 1.7164 1.5734 1.091 Carbon dioxide CO 2 0.1889 0.846 0.657 1.289 Carbon monoxide CO 0.2968 1.040 0.744 1.400 Ethane C 2H 6 0.2765 ...
The Sensible Heat Formula: Q = C x M x ∆𝑇 Q= quantity of sensible heat in BTU/hr M= mass C= specific heat of material ∆𝑇= temp difference Applied to Standard Air Applied to Water (not glycol)
Principles of Heating, Ventilating, and Air Conditioning is a textbook based on the 2017 ASHRAE Handbook—Fundamentals . It contains the most current ASHRAE procedures and definitive, yet
The chart provides a graphic representation of the properties of moist air including wet- and dry-bulb temperature, relative humidity, dew point, moisture content, enthalpy, and air density. The chart is used to plot the changes that occur in the air as it passes through an air handling system and is particularly useful in understanding these.
HVAC FORMULAS TON OF REFRIGERATION - The amount of heat required to melt F 288,000 BTU/24 hr. APPROXIMATELY 2 inches in Hg. (mercury) = 1 psi. TON OF REFRIGERATION - The amount of heat required to melt a ton (2000 lbs.) of ice at 32F. 288,000 BTU/24 hr. 12,000 BTU/hr. APPROXIMATELY 2 inches in Hg. (mercury) = 1 psi.
