engleski

Determining the feasibility of excess heat utilization in district heating system consisting of natural gas cogeneration and solar thermal

Due to the high energy intensity of heating and cooling in the European Union, with around half of the overall final energy being used in this sector, it is necessary to reduce its primary energy consumption and the environmental impact. District heating systems are being increasingly recognized as a significant means for achieving these results. Different concepts can be used in order to increase the efficiency of these systems. Some of the examples are power-to-heat systems, use of renewable energy sources and excess heat utilization. The latter is especially interesting due to its high available amounts from different industries and services, which could cover the heat demand of the majority of European households and buildings in the service sector. Nevertheless, its potential is still highly underutilized and further research is needed to demonstrate the feasibility of its implementation in district heating systems consisting of different layouts. This is especially necessary if the concept of local deregulated heat market is implemented. The main goal of this work is to use the previously developed levelized cost of excess heat method to evaluate the feasibility of excess heat utilization in a district heating system which comprises of a natural gas cogeneration plant and solar thermal. The system was modelled on an hourly level to take into account the hourly excess heat availability, i.e. its distribution throughout the year. The supply cost curve was modelled to research the effect of the excess heat utilization on the heat price. For the supply cost curve modelling purpose, levelized cost of excess heat was used instead of the marginal cost in order to give a more accurate representation of the possible local heat market.

district heating ; excess heat ; energyPRO ; hourly analysis

nije evidentirano