Study on Water-Saving Effects and Economic Optimization of Hybrid Rainwater-Graywater System in Buildings
学生名:陳 偉倫
研究テーマ:Study on Water-Saving Effects and Economic Optimization of Hybrid Rainwater-Graywater System in Buildings
(建物における雨水-中水ハイブリッドシステムの節水効果及び経済最適化に関する研究)
入学年月:2019.10
修了年月:2022.09
取得学位:博士（工学）
論文概要:
Urban water scarcity has seriously restricted the economic development of society and threatened human life. On-site reuse of rainwater and graywater by decentralized water reuse systems in buildings can significantly alleviate the deterioration of urban water scarcity. A hybrid rainwater-graywater system (HRG) is a superior water-saving system, and it can simultaneously reuse rainwater and graywater in buildings to avoid the limitation of separately reusing these waters. However, the implementation of HRGs is still in infancy and the feasibility, limitation, and its optimizing method of such systems in buildings are still an unexplored domain. Therefore, in this research, we commit to proposing the simulation models for evaluating and optimizing the optimal performance of HRGs to accurately and efficiently implement such systems in buildings. The structures are explored as follows:
In Chapter 1, the background and purpose of the research were elaborated.
In Chapter 2, the configuration and components of HRGs were introduced and the optimal HRGs were determined.
In Chapter 3, an integrated model for evaluating the performance of HRGs was proposed based on the water balance model and the accuracy of the integrated model was verified.
In Chapter 4, the environmental performance and economic benefit of HRGs in public buildings were evaluated and the advantage and limitations of implementing such systems were summarized.
In Chapter 5, a dimensionless parameter model was proposed to generally determine the optimal scenario of implementing HRGs in a region, without the requirement of individual evaluation for each building in that region.
In Chapter 6, an economic optimization model for improving the economic feasibility of HRGs was proposed based on the cooperative game. The results show that this framework can significantly improve the economic benefit of HRGs without frequent increases in local water tariffs.
In Chapter 7, the conclusion and prospects were summarized.