Structural Design of the mCCHP-RES System - Design for Micro-Combined Cooling, Heating and Power Systems - page 210

SE power load

Power load diagram
of system

(PV panels load) full

Q

P

a

V

U

R

S

4

1 2 3 567 8 9 10 11 12

Time
[month]

b

(ST panels load) full

c

I

L

SE heat load

J

K

d

Boiler load

Heat excess

N

M

Heat load diagram of
system

Fig. 29 Power driven strategy of load sharing

If this heat cannot be valorized otherwise, then the excess heat risk could be
mitigated as follows:

(a) by modulation of the ST panel load when the (ST panels) full will be replaced
with (ST panels) modulated , given by relation

ð ST panels Þ modulated ¼ ð ST panels Þ full ð Heat excess Þ;

(b) by a corresponding decrease of the ST panels area, A ST .
B. Heat driven load sharing for an off-grid system is based on the following
basic assumptions:

First, the heat load will be shared on the heat suppliers so that any excess heat
does not occur.

￿