یک عدد در رابطه با خواص هوا

[FONT=&quot]دوستان عزیزسلام. من یک عدد در رابطه با خواص هوا در آحاد انگلیسی دارم که می خواهم آن را در آحاد استاندارد جهانی بدست بیاورم.این عدد 0.018 است.تعریف انگلیسی و ترجمه آن را در زیر می نویسم:[/FONT]​

[FONT=&quot]Btu/h required to raise 1 ft³[/FONT][FONT=&quot] [/FONT][FONT=&quot]Of air 1[/FONT][FONT=&quot]°[/FONT][FONT=&quot]F[/FONT][FONT=&quot] at 100% efficiency[/FONT][FONT=&quot] [/FONT]​

[FONT=&quot] [/FONT]​

[FONT=&quot]توان(بی تی یو بر ساعت) مورد نیاز برای بالا بردن دمای 1 فوت مکعب هوای با کیفیت 100 در صد به اندازه 1 درجه فارنهایت.[/FONT]​

[FONT=&quot] [/FONT]​

[FONT=&quot]بنابراین بنده طبق استاندارد جهانی عددی با مشخصات زیر را میخواهم:[/FONT]​

[FONT=&quot]توان(وات) مورد نیاز برای بالا بردن 1 متر مکعب هوای با کیفیت 100درصد به اندازه 1 درجه سانتیگراد.[/FONT][FONT=&quot][/FONT]​

COST OF SPRAY BOOTH EXHAUST
A spray booth exhausts air to dilute the concentration of solvents and contain oversprayed
paint solids. The exhaust volume from the plant must be made up with outside
air that must be heated when the outdoor temperature is cold. The amount of energy
need depends on the location of the plant and the average outdoor temperatures.
The amount of spray booth exhaust, measured in cubic feet per minute (CFM),
depends on the size of the booth opening and the required velocity of air to maintain
a satisfactory atmosphere inside the booth. The design face-velocity depends
on both the design and the application conditions. Occupational Safety and Health
Administration (OSHA) requirements traditionally called for a minimum face velocity
of 100 ft/min (FPM) in an occupied booth. Lower velocities are permissible in an
automated booth, and the application system may also impact the design velocity.
The opening area is multiplied times the design velocity to determine the exhaust
volume.
Spray booth opening (ft2) × Design face velocity (FPM) = Exhaust volume (CFM)
The temperature difference is used to determine the amount of energy consumed
in British thermal units per hour (Btu/h) and the cost of the fuel used to
generate heat.
Plant air temperature − Outside air temperature = Temperature rise
The CFM is multiplied by the temperature rise and the value 1.1 to determine the
Btu/h. The constant 1.1 is found by multiplying 0.018 (Btu/h required to raise 1 ft3
of air 1◦F at 100% efficiency) by 60 (converting CFM to cubic feet per hour, CFH).
The value 1.08 is rounded to 1.1.
CFM × Temperature rise × 1.1 = Btu/h at 100% efficiency
The Btu/h can be multiplied by the cost per 100 ft3 of gas to determine the cost
of the exhaust air; 100 ft3 of gas is equal to 100,000 Btu/h.
Btu/h/100,000 × cost per 100 ft3 of gas = Spray booth exhaust $/h
​

Q=m.Cp.ΔT

=(ρ.V). Cp. ΔT

=(0.07298 [lbm/ft³] X 1 [ft³]) X 0.24[BTU/lbm. °F] X 1[°F]

=0.0175≈0.018 BTU​