IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at
IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at
IEA SHC Task 38 Monitoring Procedure ε elec = 0 .40 ⎡kWh ⎢ ⎢⎣ kWh elec pe ⎤ ⎥ ⎥⎦ Eq. 5 ε fossil = 0 .90 ⎡ kWh ⎢ ⎢⎣ kWh th pe ⎤ ⎥ ⎥⎦ Eq. 6 Primary energy factors depend on the process beyond the delivery of the energy carriers to the building. To enable comparisons between the different monitored installations common values have been selected. However if the user are interested in making calculations according to the special factors (national, local and so on), such values can also be defined as input.(Read “3.2.1 General input data”). The procedure also enables the definition of primary energy factors for renewable energy carriers, e.g. biomass. As base values the following can be considered: ε RES = 10 ⎡kWh ⎢ ⎢⎣ kWh th pe ⎤ ⎥ ⎥⎦ Eq. 7 One special case for the calculation of the primary energy is the utilization of cogeneration units as heat backup system. In these cases, the calculation of the primary energy factor has to account for the electricity produced with the same fuel consumption. In practice the primary energy related with the electricity output by the prime motor is discounted from the primary energy entering the cogeneration unit, according to the formula below: Where: Q CHP Q fuel ε COG = Q ε Q CHP W − ε fuel fuel el elec is the heat recovered from the engine or turbine is the monitored input energy of the driving fuel ⎡ kWh ⎢ ⎢⎣ kWh th pe ⎤ ⎥ ⎥⎦ Eq. 8 ε fuel W el ε elec is the primary energy conversion factor for the driving fuel is the electricity output by the engine or turbine is the primary energy conversion factor for the electricity Note that the calculated value represents the efficiency of the cogeneration unit but already includes the primary energy factor for the driving fuel. 9 99% draft Version
IEA SHC Task 38 Monitoring Procedure 3.2 Input data 3.2.1 General input data General data on the system are required: name, location and final use of the installation together with sizes, technologies and units of the major SHC components (i.e. solar collectors, HDC, tanks, back-up systems). It is needed to adapt the standard scheme shown in Figure 2-1 to the monitored system and list the energy flows which are monitored according to Table 1. On the basis of the sensors available, different level of information can be derived which are represented by the three different levels of the procedure. Then the major input data are basically the monthly values measured by each listed sensor. As already mentioned in the previous subchapter, the efficiencies of the machines and the primary energy factors can be also entered by the users according to special needs. So additionally to the above Tables, the parameters listed in Table 4 are added. For instance if the users know the monthly efficiency of the installed boiler, this value can be entered and used for the calculation of the monthly and yearly energy use. On the other hand if the primary energy factor of the location where the system is installed differs from the default value, it can also be entered. Table 4: Parameters which can be entered by the users Parameters Label annual electricity generation efficiency ε elec seasonal performance factor of the reference compression chiller SPF ref mean annual / monthly efficiency of the auxiliary boiler primary energy factor for fossil fuel mean annual / monthly efficiency of the RES device η boiler ε fossil η RES primary energy factor for RES fuel ε_ RES mean annual / monthly efficiency of the reference boiler η boiler,ref 3.2.2 Special input data required for DEC systems In the case of DEC systems further data are needed, especially for the 1° and the 3° level. Inputs for the 3° level partly have to be calculate d in an extra excel file (110801_T38_MonProc_V6-0_DH-calc.xls) which has been developed to calculate monthly values based on high resolution monitoring data (e.g. 5 minutes): - reference electricity consumption of the AHU (necessary for the 1° and the 3° level); - reference enthalpy difference of the AHU supply air mass flow (3° level); 10 99% draft Version
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<strong>IEA</strong> SHC Task 38<br />
Monitoring Procedure<br />
ε<br />
elec<br />
=<br />
0 .40<br />
⎡kWh<br />
⎢<br />
⎢⎣<br />
kWh<br />
elec<br />
pe<br />
⎤<br />
⎥<br />
⎥⎦<br />
Eq. 5<br />
ε<br />
fossil<br />
=<br />
0 .90<br />
⎡ kWh<br />
⎢<br />
⎢⎣<br />
kWh<br />
th<br />
pe<br />
⎤<br />
⎥<br />
⎥⎦<br />
Eq. 6<br />
Primary energy factors depend on the process beyond the delivery of the energy carriers to<br />
the building. To enable comparisons between the different monitored install<strong>at</strong>ions common<br />
values have been selected. However if the user are interested in making calcul<strong>at</strong>ions<br />
according to the special factors (n<strong>at</strong>ional, local <strong>and</strong> so on), such values can also be defined<br />
as input.(Read “3.2.1 General input d<strong>at</strong>a”).<br />
The procedure also enables the definition of primary energy factors for renewable energy<br />
carriers, e.g. biomass. As base values the following can be considered:<br />
ε RES = 10<br />
⎡kWh<br />
⎢<br />
⎢⎣<br />
kWh<br />
th<br />
pe<br />
⎤<br />
⎥<br />
⎥⎦<br />
Eq. 7<br />
One special case for the calcul<strong>at</strong>ion of the primary energy is the utiliz<strong>at</strong>ion of cogener<strong>at</strong>ion<br />
units as he<strong>at</strong> backup system.<br />
In these cases, the calcul<strong>at</strong>ion of the primary energy factor has to account for the electricity<br />
produced with the same fuel consumption. In practice the primary energy rel<strong>at</strong>ed with the<br />
electricity output by the prime motor is discounted from the primary energy entering the<br />
cogener<strong>at</strong>ion unit, according to the formula below:<br />
Where:<br />
Q CHP<br />
Q<br />
fuel<br />
ε<br />
COG<br />
=<br />
Q<br />
ε<br />
Q<br />
CHP<br />
W<br />
−<br />
ε<br />
fuel<br />
fuel<br />
el<br />
elec<br />
is the he<strong>at</strong> recovered from the engine or turbine<br />
is the monitored input energy of the driving fuel<br />
⎡ kWh<br />
⎢<br />
⎢⎣<br />
kWh<br />
th<br />
pe<br />
⎤<br />
⎥<br />
⎥⎦<br />
Eq. 8<br />
ε fuel<br />
W el<br />
ε elec<br />
is the primary energy conversion factor for the driving fuel<br />
is the electricity output by the engine or turbine<br />
is the primary energy conversion factor for the electricity<br />
Note th<strong>at</strong> the calcul<strong>at</strong>ed value represents the efficiency of the cogener<strong>at</strong>ion unit but already<br />
includes the primary energy factor for the driving fuel.<br />
9 99% draft Version
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