Search results
The material is divided into three major sections: general concepts, Chapters 1–10; air-conditioning systems, Chapters 11–16; and HVAC&R equipment, Chapters 17–20. There are several significant changes in this revised edition. Chapter 4 has new values for climatic design information. Chapter 7 has been extensively revised with new design ...
Table A–1 Molar mass, gas constant, and critical-point properties Table A–2 Ideal-gas specific heats of various common gases Table A–3 Properties of common liquids, solids, and foods Table A–4 Saturated water—Temperature table Table A–5 Saturated water—Pressure table Table A–6 Superheated water Table A–7 Compressed liquid water Table A–8 Saturated ice–water vapor
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.
The properties listed here (except the vapor density) can be used at any pressures with negligible error except at temperatures near the critical-point value. Note 2: The unit kJ/kg· C for specific heat is equivalent to kJ/kg·K, and the unit W/m· C for thermal conductivity is equivalent to W/m·K.
INTRODUCTION. This section provides information on use of the psychrometric chart as applied to air conditioning processes. 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.
HVACR 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 Hg. (mercury) = 1 psi.
