既存の地域冷暖房と連携したスマートヒートグリッド（SHG）に関する研究

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  • 永井 猛
    芝浦工業大学大学院理工学研究科地球環境システム専攻

書誌事項

タイトル別名
  • STUDY ON SMART HEAT GRID (SHG) IN COOPERATION WITH EXISTING DISTRICT HEATING AND COOLING
  • 既存の地域冷暖房と連携したスマートヒートグリッド(SHG)に関する研究 : SHGの中心的な技術要素「熱ルータ」の技術確認も含めて
  • キソン ノ チイキ レイダンボウ ト レンケイ シタ スマートヒートグリッド(SHG)ニ カンスル ケンキュウ : SHG ノ チュウシンテキ ナ ギジュツ ヨウソ 「 ネツ ルータ 」 ノ ギジュツ カクニン モ フクメテ
  • ～SHGの中心的な技術要素「熱ルータ」の技術確認も含めて～
  • ～ Including technical confirmation of SHG's core technical element “heat router” ～

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抄録

 In Japan, the need to reduce energy consumption for business use and household use is questioned. Therefore, further promotion of energy conservation is necessary. Community-wide energy utilization is one way to deal with it.<br> Smart Heat Grid (SHG)is a heat accommodation system between buildings with distributed energy systems.<br> Heat router is the core technical element of SHG. Choose the optimal transport power among the buildings that heat interchange, and send and receive heat. The effectiveness of heat router was confirmed by 38 control experiments. That objective is to confirm whether heat accommodation control can be stably performed within the assumed time. As a result, it was confirmed that the target error is within 10% of the design flow rate, and the time to shift to the different heat interchange state is within 10 minutes. This time it was done with the control system from the center, but in future it will be made it a distributed control system. This results was confirmed the possibility of extensibility of SHG.<br> Simulation of existing DHC coordinated type SHG was conducted for existing buildings, in case of 10%, 30%, 50% heat accommodation to annual heat load. It was targeted the existing DHC in the metropolitan area and the four model buildings of hotels, offices, commercial facilities and hospitals. For DHC, it was also examined the latest heat source system using gas engine type CGS. As a result, the following conclusions were obtained.<br> (1) BAU ratio of energy saving , current DHC 0.76 ~ 10.08%, New DHC 1.19% ~ 13.83%.<br> (2) The effective cross-sectional area of the heat accommodated piping was 30% to 60% as compared with the total supply system.<br> (3) The proportion of time that the heat source of the model building supplementarily operates decreases, and the heat accommodation greatly contributed.<br> (4) Waste heat (hot water) of the gas engine greatly contributes to the thermal demands of the model building.<br> This study checked a business-related evaluation. (internal rate of return, net present value, the accumulated deficit cancellation year) Since risk of fluctuation in purchased energy cost can be considered in the future, sensitivity analysis in which the utility fee is reduced by 10% · 30% was made. If SHG can be applied 1/2, 2/3 business subsidy (it is carried out now), this result can be confirmed that it is profitable business.

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