지역난방 시스템과 연계한 연료전지 폐열 회수 효과 분석

초록

This study proposes a district heating network that uses the existing 3rd generation district heating but modifies the configuration of heat exchangers to enable a low temperature network in the second loop. By lowering the supply temperature, the system can increase the use of renewable energy such as fuel cells. The study aims to quantitatively calculate the effectiveness of the proposed method through simulation. Results show that the proposed district heating system decreases the source-side total flow rates compared to the existing 3rd generation district heating. In addition, installation of fuel cells in the proposed model can reduce energy consumption by 23% with 10% of the capacity of the whole district heating system. The proposed model has the potential to induce efficiency improvement of the entire district heating system, reduce energy loss of the long-distance heat pipe network, and increase the efficiency of the heat supply facility.

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