IM-P408-04
EMM Issue 7
53
B850-W and B850-P Boiler House Energy Monitor
Calculation for Imperial (MBtu / h)
Click on
Edit each '1' in the above calculation to add the following values:
Flow co-efficient - Cv -
Value must be taken from the technical documentation of
the BBD Valve (Cv = Kv x 1.156).
Enthalpy (Btu / lb) -
Derive the value for your boiler from the look up tables in Section
10.31.3
Density (lb /ft³) -
Derive the value for your boiler from the look up tables in Section
10.31.3
Other measured units: Pressure (psi) and Relative Density (lb / ft³).
It is assumed that there will be a backpressure of 10%, so a factor of 0.9 can be seen
in the calculation. If backpressure is different adjust formula accordingly.
Density
Enthalpy
Cv
( Y.Vt
*1*1*1*8.020833*
s qr t ((A . p D * 0. 9)* 6 2 . 4279 6/1))
1000
