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Efficient of Variance of the Root Imply Square Error), defined as [33]: (Phosphonoacetic acid Epigenetic Reader Domain Measured day – TRNSYSday (Measured day RMSEday Imply(Measured day (Measured day – TRNSYSdayMBE =100(11)CV – RMSE =100(12)RMSE =(Numberofday) -(13)Figure 8 compares the everyday heating load predicted by TRNSYS together with the measured data. As a result of missing measured data for the 1st, 23th, and 24th, the simulation result for these 3 days was also removed for the validation. Following the processing, the MBE was within the acceptable range (less than 5), however the CV-RMSE was above the criteria for a calibrated model (less than 15). In consideration that the measured information was only evaluated from the regular record of boiler fuel consumption, not a strict experiment, we can say this can be an acceptable error, and also the thermal load evaluated by TRNSYS is usually applied within the dynamic simulation from the FC-CHP program. Figure 9 presents the results from the evaluation of theEnergies 2021, 14,11 ofspace heating load and swimming pool heat loss primarily based around the weather data of Donghae city. The peak load values are about 330 kW and 120 kW for space heating and swimming pool heat loss. For the swimming pool, high heat loss is also presented even in summer season, as a result of evaporation heat loss accounting for the largest proportion on the total heat loss.Figure 8. Validation on the daily heating energy consumption amongst the simulation data and measured data.Figure 9. Building space heating load and swimming pool heat loss evaluated by the TRNSYS simulation.Figure ten presents the simulation final results of your power demand and provide of your FC-CHP technique with the ELT (a) and FTO (b) FC operating method, such as the constructing electrical energy load, thermal load, fuel cell Chlorpyrifos-oxon In Vivo electric power generation, heat generation (higher grade and low grade), and efficient heat. For the ELT model, the fuel cell is not going to work through the evening time due to the electricity load being significantly less than one hundred kW, that is theEnergies 2021, 14,12 ofminimum electric energy capacity with the fuel cell. For the FTO model, the fuel cell is operating at the maximum capacity all of the time, so that each the electric power and thermal heat generation are presented because the continuous maximum worth. Right here, it has to be pointed out that, for the thermal heat supply for any industrial creating, the high-grade waste heat from a fuel cell which has a temperature of about 120 C can’t be supplied towards the constructing directly. A heat exchanger is advisable to transform the high-grade heat temperature to a low grade. Thus, thinking about the heat exchanger efficiency, the efficient heat is essential to evaluate and be used for the analysis with the main power saving and economic feasibility.Figure 10. Power demand and provide of FC-CHP systems for the initial week of January ((a) ELT model; (b) FTO model).Energies 2021, 14,13 ofThe major power consumption for each the ELT and FTO models are evaluated from the annual program simulation. The results are compared with a reference case with a standard energy and heat provide technique. The main energy consumption might be evaluated as: PEC = FFC Fb FGE (14) exactly where FFC , Fb , and FGE are the fuel energy consumption with the fuel cell, boiler, and electric power supplied from the principal power grid. For the FC-CHP technique, the fuel cell and boiler fuel power consumption is usually evaluated in the simulation directly. Inside the case on the traditional energy provide strategy, the efficiency of your gas boiler and grid energy are assumed to be 0.

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Author: haoyuan2014