IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38
Monitoring Procedure
Table 8: Output of the spreadsheet for the calculation of enthalpy differences (DH)
Description of data output
Label
Difference between cooling energy delivered from DEC AHU and from
conventional AHU with fixed supply temperature, m*DH AHU corr
Difference of enthalpy (cooling energy) achieved from cooling coil in
conventional AHU, m*DH AHU CC
Difference of enthalpy (heating energy) achieved from heating coil in
conventional AHU, m*DH postheat
Difference of enthalpy between inlet (external) air and outlet (supply ) air
of conventional AHU, m*DH AHU conv
m*DH AHU DEC cooling
m*DH AHU DEC heating
ΔH corr
ΔH conv_CC
ΔH postheat
ΔH conv_AHU
ΔH AHU_cool
ΔH AHU_heat
These outputs are the special input on the monitoring procedure for DEC systems.
On their basis the Primary Energy Ratio for conventional AHU (PER REF) can be calculated
as follows:
PER
ref _ DEC
=
∆H
conv _ CC
SPF ⋅ ε
el
∆H
∆H
+
η
boiler
conv _ AHU
postheat
⋅ ε
fossil
E
+
elec,conv _ AHU
ε
elec
⎡ kWh
⎢
⎣kWh
th
elec
⎤
⎥
⎦
Eq. 61
The Primary Energy Saving factor f save is calculated as for all Solar Heating and Cooling
systems with PER RES or PER fossil :
PER
f sav, shc = 1−
PER
ref
RES / fossil
Eq. 62
3.4 Summary of the output of the procedure
The monitoring procedure supports the evaluation of the performance of the monitored
system and its comparison with a conventional system. To this purposes, three level of data
29 99% draft Version