發(fā)布時間：2018-10-10 13:52

【摘要】：隨著生產(chǎn)發(fā)展、生活水平提高,能量消耗迅速增長,開發(fā)利用新能源已經(jīng)是當(dāng)今社會迫切需要解決的熱點問題。目前,天然氣是世界上眾多能源中最清潔的能源,由于其儲量豐富,天然氣的開發(fā)與利用越來越得到世界各國的高度重視。太陽能作為一種潔凈能源,不僅是一次能源,同時也是可再生能源,太陽能資源豐富,對環(huán)境無任何污染。在現(xiàn)在,能源和環(huán)境問題越來越得到人們的普通重視,開發(fā)利用太陽能一方面減少環(huán)境污染,另一方面可有效節(jié)約高位能,因此具有廣闊的應(yīng)用前景。本文在已有的太陽能熱泵系統(tǒng)和燃?xì)鉄岜孟到y(tǒng)基礎(chǔ)上,提出了一種新型供熱系統(tǒng),即太陽能燃?xì)鉄岜霉嵯到y(tǒng),本系統(tǒng)是以太陽能作為熱泵系統(tǒng)蒸發(fā)器端的熱源,由燃?xì)獍l(fā)動機(jī)驅(qū)動的熱泵供熱系統(tǒng),即以太陽能作為低品位能,利用燃?xì)獍l(fā)動機(jī)驅(qū)動壓縮機(jī)完成熱泵循環(huán),不僅能夠回收系統(tǒng)余熱,提高整個系統(tǒng)的COP和一次能源利用率PER,而且以天然氣作為能源的同時可以緩解電網(wǎng)的壓力,同時天然氣作為一種清潔能源,還能夠減少對環(huán)境的污染。在運行上,由于燃?xì)獾馁M用要低于電費,從而還可以節(jié)約一定的運行費用。因此,太陽能燃?xì)鉄岜玫难芯烤哂泻艽蠊?jié)能和經(jīng)濟(jì)的意義。本文設(shè)計了太陽能燃?xì)鉄岜孟到y(tǒng)與外網(wǎng)互補(bǔ)供熱原理圖,并對其各個子供熱系統(tǒng)進(jìn)行設(shè)計,對整個系統(tǒng)的運行模式進(jìn)行了較為詳細(xì)的研究。從能耗和經(jīng)濟(jì)性兩個方面分析,將本系統(tǒng)和其他現(xiàn)有的供熱系統(tǒng)進(jìn)行比較。以TRNSYS、Dest及MATLAB仿真模擬軟件為工具,對太陽能燃?xì)鉄岜孟到y(tǒng)在整個供暖期進(jìn)行了仿真模擬,研究本供熱系統(tǒng)在我國嚴(yán)寒地區(qū)條件下的適用性,以期為實際工程的設(shè)計提供一定參考。利用Dest和TRNSYS對基準(zhǔn)建筑物的模型進(jìn)行建立,分析了基準(zhǔn)建筑動態(tài)負(fù)荷及太陽能部分與燃?xì)鉄岜貌糠炙艹袚?dān)的總負(fù)荷比例,得出兩者負(fù)荷比例為：燃?xì)鉄岜贸袚?dān)65%的設(shè)計負(fù)荷,太陽能部分承擔(dān)35%的設(shè)計負(fù)荷,為系統(tǒng)設(shè)備選型提供了依據(jù)。利用TRNSYS軟件對太陽能供熱系統(tǒng)進(jìn)行了仿真模擬,利用MATLAB軟件對燃?xì)鉄岜眠M(jìn)行了仿真模擬,將前者得到的數(shù)據(jù)帶入后者,作為蒸發(fā)端的輸入數(shù)據(jù),即可模擬出整個系統(tǒng)的供熱性能,可以得到系統(tǒng)的COP最高可達(dá)到4.76,一次能源利用率PER最高可達(dá)到1.96,且冷凝端溫度可達(dá)到57.8℃,通過比較可知本系統(tǒng)性能優(yōu)于太陽能熱泵系統(tǒng)和燃?xì)鉄岜孟到y(tǒng)。從供熱系統(tǒng)的穩(wěn)定性、安全性、使用壽命及經(jīng)濟(jì)性角度考慮,為了得到更多的冷凝熱量,不能夠無限增加燃?xì)庥昧?應(yīng)使天然氣的用量保證在一定的可控范圍內(nèi)。當(dāng)壓縮機(jī)的轉(zhuǎn)數(shù)取在1600—2000轉(zhuǎn)/分的范圍內(nèi)時,太陽能燃?xì)鉄岜霉嵯到y(tǒng)的供熱性能和舒適性最好,在系統(tǒng)運行過程中,應(yīng)盡可能通過對天然氣使用量的調(diào)節(jié),使壓縮機(jī)轉(zhuǎn)速保證在1600—-2000轉(zhuǎn)／分區(qū)間內(nèi)。
[Abstract]:With the development of production, the improvement of living standard and the rapid increase of energy consumption, the development and utilization of new energy has become a hot issue that needs to be solved urgently. At present, natural gas is the cleanest energy among many energy sources in the world. Because of its rich reserves, the development and utilization of natural gas have been paid more and more attention to. As a clean energy, solar energy is not only a primary energy, but also a renewable energy. Solar energy resources are abundant, and no pollution to the environment. Nowadays, people pay more and more attention to the energy and environment problems. On the one hand, the exploitation and utilization of solar energy can reduce environmental pollution, on the other hand, it can effectively save high energy, so it has a broad application prospect. Based on the existing solar heat pump system and gas heat pump system, a new type of heating system, solar gas heat pump heating system, is proposed in this paper. The system uses solar energy as the heat source of the evaporator of the heat pump system. The heat pump heating system driven by gas engine, which takes solar energy as low-grade energy and uses gas engine to drive compressor to complete the heat pump cycle, can not only recover the residual heat of the system, Increasing the COP and primary energy utilization PER, of the whole system and using natural gas as energy can relieve the pressure of power grid, and natural gas as a kind of clean energy can also reduce the pollution to the environment. In operation, the cost of gas is lower than electricity, so it can save a certain operating cost. Therefore, the study of solar gas-fired heat pump has great energy-saving and economic significance. In this paper, the schematic diagram of complementary heating between solar gas heat pump system and outer net is designed, and each sub-heating system is designed, and the operation mode of the whole system is studied in detail. This system is compared with other existing heating systems in terms of energy consumption and economy. Based on TRNSYS,Dest and MATLAB simulation software, this paper simulates the solar gas heat pump system in the whole heating period, and studies the applicability of the heating system in the cold region of our country, in order to provide some reference for the design of the actual project. The model of reference building is built by Dest and TRNSYS. The dynamic load of reference building and the total load ratio of solar energy and gas heat pump are analyzed. The results show that the load ratio of the two is 65% of the design load of gas heat pump. The solar energy part bears 35% of the design load, which provides the basis for the selection of the system equipment. The solar heating system is simulated by TRNSYS software, and the gas-fired heat pump is simulated by MATLAB software. The data obtained from the former is brought into the latter as the input data of the evaporator. The heating performance of the whole system can be simulated. The maximum COP of the system can reach 4.76, the PER of primary energy utilization can reach 1.96, and the condensation end temperature can reach 57.8 鈩，

本文編號：2262031