and promote local business and industry. The main advantages with district heating are high security of supply through utilisation of domestic renewable energy resources, if available, low primary energy demand due to high conversion efficiency, as well as small CO2 emissions thanks to low fossil fuel use and the high energy efficiency. Incineration of waste with heat recovery to district heating may be used at very low cost. District heating also gives opportunity for cogeneration of power and heat with very high efficiency. District heating enables profitable heat supply with outstanding environmental performance but there are in many places various barriers to a prosperous DH development. Barriers to district heating in the United Kingdom (UK), Ireland, France, Romania and the Czech Republic, as well as barriers to export of Swedish district heating knowledge and products to these countries have been compiled from publications and through personal communication with
energiaploki kasutegur küünib üle 60%. 59(113) Villu Vares Energia ja keskkond Joonis 5.58. Siemensi võimsa gaasiturbiini SGT5-8000H (375 MW) rootor 60(113) Villu Vares Energia ja keskkond 6 SOOJUSE JA ELEKTRI KOOSTOOTMINE Elektrienergia ja soojuse kombineeritud tootmine (CHP, cogeneration heat and power) on protsess, kus ühest tehnoloogilisest protsessist ja seadmest väljastatakse nii soojust kui elektrit. Soojuse ja elektrienergia kombineeritud tootmise eesmärk on alandada energia tootmiseks vajaliku kütuse kogust ja vähendada kahjulike ühendite emissiooni energiaühiku kohta. Koostootmisel saab kasutada kütust, mida lokaalkatlamajas kasutada ei saa või mille kasuta- mine on keerukas (kivisüsi, masuut, hakkpuit, turvas).
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