Mass balance and energy (heat) balance equations
are formed using algebraic equations which are derived from experimental data
and calibration process are done for level, Flow transmitters (differential
pressure transmitter), temperature transmitter (3 – wire resistance
temperature detector(RTD), Valve actuators and unknown quantities such
transfer of heat through the heating
coils7. The relationships between these parameters are practically nonlinear
and also the constraints are very hard such as tank should not be empty and
overflow.
Mass
& Energy balance of the process dynamics are given by the following
equations
= fwc + fwh – fo(l) …..(1)
= Wst + hwh + lwhfwh
+ hwc lwcfwc – houtloutfo(l)
….(2)
Where,
l
–
Denotes level
V
–
Volumes of
water
fwh
–
Hot water flow
fwc
–
Cold water
flow
fo

outflow
H
–
Heat rate
(total enthalpy)
hwh
–
Specific
enthalpy of hot water
hout
–
Specific
enthalpy of outlet water
lwc
–
Cold water
density
lwh
–
Hot water
density
The
temperature of cold and hot water set to 25
and 55
respectively.
Mass balance and energy (heat) balance equations
are formed using algebraic equations which are derived from experimental data
and calibration process are done for level, Flow transmitters (differential
pressure transmitter), temperature transmitter (3 – wire resistance
temperature detector(RTD), Valve actuators and unknown quantities such
transfer of heat through the heating
coils7. The relationships between these parameters are practically nonlinear
and also the constraints are very hard such as tank should not be empty and
overflow.
Mass
& Energy balance of the process dynamics are given by the following
equations
= fwc + fwh – fo(l) …..(1)
= Wst + hwh + lwhfwh
+ hwc lwcfwc – houtloutfo(l)
….(2)
Where,
l
–
Denotes level
V
–
Volumes of
water
fwh
–
Hot water flow
fwc
–
Cold water
flow
fo

outflow
H
–
Heat rate
(total enthalpy)
hwh
–
Specific
enthalpy of hot water
hout
–
Specific
enthalpy of outlet water
lwc
–
Cold water
density
lwh
–
Hot water
density
The
temperature of cold and hot water set to 25
and 55
respectively.