12th International Symposium on District Heating and Cooling

1. CHP system operation in A2. Thermal networking operation using CHP in B3. HOB operation in A4. Thermal networking using HOB in BThe <strong>12th</strong> <strong>International</strong> <strong>Symposium</strong> on District Heating and Cooling,September 5 th to September 7 th , 2010, Tallinn, Estonia(a) Case A(b) Case BFig. 10. Comparison of energy load prediction: elec. LoadFig. 8. Schemes of the networking operation2. Test Case & Energy Loads PredictionOn the basis of the operation schemes for variousavailable heat sources as described above, theanalysis for the operation behaviour of networkoperation of both systems with those of respectivesystem is performed for two distinct test cases ofresidential buildings only, and a group of nonresidentialones.(a) Case A(b) Case BFig.11. Comparison of energy load prediction: cooling load(Case B)For case A, the area is only comprised of residentialpurpose buildings, i.e. apartments, whereas for case Bit is comprised of non-residential purpose buildingssuch as commercial buildings, offices, hotels, andhospitals. The annual hourly energy load data isestimated by using the energy load prediction module.The comparison of predicted energy loads, in the formof the annual distribution and the cumulative curve, aregiven as shown in Fig. 9 to Fig. 11.3. Operation Simulation ResultsFor the test case comprised of only residentialbuildings, the cooling load is reflected on the electricityload by assuming that it is covered by the airconditioner or electric fan in individual houses.Consequently, the aspect of efficient utilization of therecovered waste heat during the summer is supposedto be a decisive factor in the optimization of the CHPsystem.Fig. 9. Comparison of energy load prediction: heating load161