Deutz TCD 2012 Series - ANNEX; Calculation formulae for internal combustion engines

INSTALLATION MANUAL TD/TCD 2012 / 2013
17. ANNEX
17.1 Calculation formulae for internal combustion engines
Exhaust gas volume flow rate:
In the pocket book, the exhaust gas volume flow rate M [kg/h] is indicated related to 25 °C. To
determine the actual volume flow rate V
W
, the first "cold" volume flow rate V
K
is ascertained:
V
K
= M / U
[m³/h] with M [kg-exhaust/h] from pocket book
U [kg-exhaust/m³] = 1.18
The actual volume flow rate V
W
is calculated with the aid of the exhaust gas temperature "t" at
the respective power – see engine map – neglecting the influence of pressure:
V
W
= V
K
x ( 273 + t ) / 298 [m
3
/h]
Swept volume:
V
H
= ( S x D² x s x z ) / 4 x 10
6
[ltr]
V
H
= Swept volume [ltr]
D = Bore diameter [mm]
s = Stroke [mm]
z = Number of cylinders
S= 3.12 for German swept volume
Piston speed:
c
m
= s x n / 30000 [m/s]
c
m
= Mean piston speed [m/s]
s = Stroke [mm]
n = Engine speed [1/min]
Circumferential speed
c
U
= r x ( S x n ) / 30 [m/s]
c
U
= Circumferential speed [m/s]
r = Radius [m]
n = Speed [1/min]
Power/torque
Old units SI-units
N = V
H
x p
e
x n / 900 [PS] P = V
H
x p
me
x n / 1200 [kW]
T
d
= 716,2 x N / n [kpm] T = 9550 x P / n [Nm]
EDITION 05.2006 Modification index 00 17 - 1