本文選題：分布式能源　切入點：區(qū)域供能系統　出處：《湖南大學》2015年碩士論文

【摘要】：隨著傳統化石能源的逐漸消耗、能源供應的日益緊張和人們對能源需求及對空氣污染擔憂的增長,提高能源利用率、合理利用資源和節(jié)能減排已成為全球關注的問題,在此種背景下,因其在節(jié)能環(huán)保和運行等方面的優(yōu)勢,區(qū)域供冷和分布式能源系統等高效節(jié)能技術受到了廣泛的關注和應用。分布式能源系統可實現區(qū)域供冷,將分布式能源系統與區(qū)域供冷結合可降低區(qū)域供冷的運行成本,使得區(qū)域供冷系統在節(jié)能領域中占重要的地位。區(qū)域供冷和分布式能源系統的節(jié)能、經濟和環(huán)保優(yōu)勢僅在其有合理的配置運行下才能充分發(fā)揮。因而對其進行優(yōu)化研究很有必要。本文通過建立一個以一次能源節(jié)約率最大和成本節(jié)約率最大為優(yōu)化目標的優(yōu)化模型,并利用e QUEST軟件模擬計算夏熱冬冷地區(qū)某典型公共建筑小區(qū)的全年逐時冷熱電負荷,對由燃氣分布式能源系統(燃氣冷熱電聯產系統)和土壤源熱泵組成的區(qū)域供能系統供冷季即冷電工況下的運行進行了優(yōu)化研究。其運行策略為先進行成本節(jié)約最優(yōu)再進行節(jié)能最優(yōu)。并從經濟的角度以年折算費用最小為優(yōu)化目標對此典型小區(qū)的區(qū)域供冷管網供回水溫差進行了優(yōu)化,得出最佳的溫差為6.3℃。此外,還討論了電價和天然氣價格等主要因素的變化對此區(qū)域供能系統運行的影響,當電價較低,天然氣價格較高時燃氣冷熱電聯產系統不運行,區(qū)域的負荷需求由土壤源熱泵和電網滿足;當電價較高,天然氣價格較低時燃氣冷熱電聯產系統運行,區(qū)域的負荷需求先由燃氣冷熱電聯產系統滿足,若不足則由土壤源熱泵和電網來提供。燃氣分布式能源與土壤源熱泵耦合系統是一次能源(天然氣)與可再生能源(土壤)的結合,其有效運作可彌補各子系統單獨運行時的不足,并提高系統的節(jié)能性和經濟性等。對分布式能源和地源熱泵耦合系統進行優(yōu)化配置和運行,會使得系統具有更經濟、環(huán)保、節(jié)能的特性,也可為分布式能源系統和其他可再生能源系統的結合提供參考。
[Abstract]:With the gradual consumption of traditional fossil energy, the increasing shortage of energy supply and the increase of people's concern about energy demand and air pollution, increasing energy efficiency, rational utilization of resources and energy saving and emission reduction have become the global concern. In this context, because of its advantages in energy-saving, environmental protection and operation, regional cooling and distributed energy systems and other high-efficiency energy-saving technologies have been widely concerned and applied. Distributed energy systems can realize regional cooling. The combination of distributed energy system and regional cooling can reduce the running cost of regional cooling, and make the regional cooling system play an important role in the field of energy saving. The advantages of economy and environmental protection can only be brought into full play when they have reasonable configuration and operation. Therefore, it is necessary to study on the optimization of the advantages. In this paper, we set up a method to optimize primary energy saving rate and cost saving rate. The optimization model of the target, The hourly cooling and heating power load of a typical public building district in hot summer and cold winter area is calculated by using e QUEST software. The operation of regional energy supply system which is composed of gas distributed energy system (gas cooling, heat and power cogeneration system) and ground source heat pump (GSHP) is studied in this paper. The operation strategy is cost saving first. From the economic point of view, with the minimum annual conversion cost as the optimization goal, the temperature difference between the supply and return water of the district cooling pipe network in this typical district is optimized. The optimum temperature difference is 6.3 鈩，

本文編號：1658013