Long-term Operation Planning of District Heating and Cooling Plants Considering Contract Violation Penalties

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  • 契約違反を考慮した地域冷暖房プラントの長期運転計画
  • ケイヤク イハン オ コウリョ シタ チイキ レイダンボウ プラント ノ チョウキ ウンテン ケイカク

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Abstract

Urban district heating and cooling (DHC) systems operate large freezers, heat exchangers, and boilers to stably and economically supply hot and cold water, steam etc., based on customers demand. We formulate an operation-planning problem as a nonlinear integer programming problem for an actual DHC plant. To reflect actual decision making appropriately, we incorporate contract-violation penalties into the running cost consisting of fuel and arrangements expenses. Since a yearly operation plan is necessary for check whether the minimum gas consumption contract is fulfilled or not, we need to solve long-term operation-planning problems. To fast and approximately solve long-term operation-planning problems, we propose a decomposition approach using coarse (monthly) approximate operation-planning problems.

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