Onicon F-2600 Instrukcja Użytkownika Pobierz pdf (Strona 124)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727) 442-5699 • [email protected]

F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page B-3

Fluid Calculations

Calculations for Steam T & P

When “Steam T & P” is selected in the “Real Gas” selection of the Fluid Menu,

the calculations are based on the equations below.

Density

The density of steam is calculated from the formula given by Keenan and Keys.

The given equation is for the volume of the steam.

v =

4.555.04 ● T

+ B

B = B

+ B

(τ) τ ● p + B

(τ)τ

● p

- B

(τ)τ

● p

- 1.89 - 2641.62 ● τ

1080870τ

(τ) = 82.546 ● τ 1.6246 ● 10

● τ

(τ) = 0.21828 - 1.2697 10

● τ

(τ) = 3.635 ● 10

-4

- 6.768 10

● τ

Where tau is 1/ temperature in Kelvin.

The density can be found from 1/(v/ standard density of water).

Viscosity

The viscosity is based on an equation given by Keenan and Keys.

η (poise) =

1.501

● 10

-5

√T

1 + 446.8 / T

Where T is the temperature in Kelvin.

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 130 131

Brak uwag

Onicon F-2600 Instrukcja Użytkownika Strona 124