本文選題：地源熱泵系統(tǒng) + 熱平衡��； 參考：《揚(yáng)州大學(xué)》2014年碩士論文

【摘要】：地埋管地源熱泵是一種隨著能源危機(jī)和環(huán)境污染加深而興起的可再生能源利用空調(diào)系統(tǒng),該系統(tǒng)具有高效節(jié)能、無環(huán)境污染、穩(wěn)定性好、運(yùn)行費(fèi)用低等優(yōu)點(diǎn)。地源熱泵技術(shù)的理論研究和設(shè)計(jì)應(yīng)用在國內(nèi)外已經(jīng)非常成熟,但是系統(tǒng)的運(yùn)行管理才是實(shí)現(xiàn)該系統(tǒng)高效節(jié)能的關(guān)鍵,因此,本文針對揚(yáng)州市某住宅小區(qū)的地源熱泵系統(tǒng)進(jìn)行了測試,分析夏熱冬冷地區(qū)地源熱泵系統(tǒng)運(yùn)行特性,并建立地埋管換熱器模型,預(yù)測該系統(tǒng)未來是否存在熱平衡問題。 首先,對國內(nèi)外的能源利用現(xiàn)狀、地源熱泵系統(tǒng)的技術(shù)研究和應(yīng)用市場、地源熱泵系統(tǒng)的發(fā)展前景和國內(nèi)關(guān)于發(fā)展地源熱泵的法律法規(guī)及地方省市的鼓勵政策進(jìn)行了綜合性的分析。 其次,對揚(yáng)州市某地源熱泵系統(tǒng)歷年運(yùn)行數(shù)據(jù)進(jìn)行了分析,對該系統(tǒng)夏季運(yùn)行工況進(jìn)行了測試和調(diào)整,并分析系統(tǒng)夏季運(yùn)行特性。分析的內(nèi)容為：空調(diào)系統(tǒng)瞬時負(fù)荷分析；設(shè)計(jì)負(fù)荷與實(shí)際負(fù)荷誤差分析；土壤全年吸放熱量分析；系統(tǒng)熱平衡問題分析；地源熱泵機(jī)組性能系數(shù)分析；系統(tǒng)能效比分析；系統(tǒng)能耗分析；土壤溫度恢復(fù)情況分析。 然后,利用ANSYS-CFX模擬軟件建立了地埋管換熱器模型,對地埋管換熱器布置區(qū)域的土壤溫度場進(jìn)行模擬分析,并利用系統(tǒng)歷年的實(shí)測數(shù)據(jù)驗(yàn)證模型的正確性,模擬值與實(shí)測值絕對誤差為2.5%,精確性較高。 最后,利用地埋管換熱器模型分別對本工程入住率穩(wěn)定在50%工況和入住率每年增加10%工況進(jìn)行了模擬,預(yù)測土壤溫度場五年的溫度變化。得到結(jié)論：本小區(qū)在入住率恒定50%的條件下,未來五年土壤溫度降低不明顯,不存在明顯熱平衡問題,不影響機(jī)組正常運(yùn)行；在入住率每年增加10%的條件下,未來五年土壤平均溫度約降低了2.5℃,系統(tǒng)存在熱平衡問題,如不采取相應(yīng)措施,將影響系統(tǒng)能效。并提出了相應(yīng)的解決方案。
[Abstract]:Ground source heat pump (GSHP) is a kind of renewable energy utilization air conditioning system with energy crisis and environmental pollution. It has the advantages of high efficiency, no environmental pollution, good stability and low operating cost. The theoretical research and design and application of ground-source heat pump technology have been very mature at home and abroad, but the operation and management of the system is the key to realize the high efficiency and energy saving of the system. In this paper, the ground-source heat pump system in a residential district in Yangzhou is tested, the operating characteristics of ground-source heat pump system in hot summer and cold winter area are analyzed, and the ground source heat exchanger model is established to predict whether the system will have heat balance in the future. First of all, to the domestic and foreign energy utilization present situation, the ground source heat pump system technical research and the application market, The prospect of ground-source heat pump system and the domestic laws and regulations on the development of ground-source heat pump system as well as the encouragement policies of local provinces and cities are comprehensively analyzed. Secondly, the operating data of a ground-source heat pump system in Yangzhou City are analyzed, the operating conditions of the system in summer are tested and adjusted, and the operating characteristics of the system in summer are analyzed. The contents of the analysis are as follows: instantaneous load analysis of air conditioning system; error analysis of design load and actual load; analysis of annual soil heat absorption and emission; analysis of system heat balance; analysis of performance coefficient of ground source heat pump unit; analysis of system energy efficiency ratio; System energy consumption analysis; soil temperature recovery analysis. Then, the ground tube heat exchanger model is established by using ANSYS-CFX software, and the soil temperature field of the ground buried tube heat exchanger arrangement area is simulated and analyzed, and the correctness of the model is verified by the measured data of the system over the years. The absolute error between the simulated value and the measured value is 2.5 and the accuracy is high. Finally, the model of underground tube heat exchanger was used to simulate the steady occupancy rate of the project at 50% and the increase of the occupancy rate by 10% per year, respectively, and to predict the temperature change of the soil temperature field for five years. It is concluded that under the condition of constant occupancy rate of 50%, the soil temperature will not decrease obviously in the next five years, there will be no obvious heat balance problem, and the normal operation of the unit will not be affected. Under the condition that the occupancy rate increases by 10% per year, In the next five years, the average soil temperature will be reduced by 2.5 鈩，

本文編號：1935905