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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 ...
Specific Heat Ratio of air at temperatures ranging -40 - 1000 degC (-40 - 1500 degF) at standard atmospheric pressure - Imperial and SI Units.
Psychrometrics can be used to predict changes in the environment when the amount of heat and/or moisture in the air changes. Use of psychrometric analysis is also important to determine the volume flow rates of air to be pushed into the ducting system and the sizing of the major system components.
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
Specific volume: The volume of air per unit of mass. Specific volume can be expressed in cubic feet per pound of dry air. The reciprocal of density. Total heat (also termed enthalpy): The sum of sensible and latent heat expressed in Btu or calories per unit of mass of the air. Total heat, or enthalpy, is usually measured
Total Heat: TH = 1.2 Q∆h. Latent Heat: LH = 3.0 Q∆w. where heat is in W = ∆t temperature difference, K or °C = ∆h enthalpy difference, kJ/kg ∆w = moisture concentration, g/kg dry air = Q flow rate of air, L/s. Pump or Fan Power. P = Q h. × × ρ/n.
