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plc控制熱泵系統(tǒng)畢業(yè)設(shè)計(jì)-資料下載頁(yè)

2024-11-08 22:17本頁(yè)面

【導(dǎo)讀】地源熱泵是利用淺層地能進(jìn)行供熱制冷的新型能源利用技術(shù),是熱泵的一種,熱泵是利用卡諾循環(huán)和逆卡諾循環(huán)原理轉(zhuǎn)移冷量和熱量的設(shè)備。地源熱泵還利用了地下土壤巨大的蓄熱蓄冷能力,冬季地源把熱量。成一個(gè)冷熱循環(huán)。則十分廣泛,應(yīng)包括所有地下資源的含義。但在空調(diào)業(yè)內(nèi),目前僅指地殼表層(小。1946年美國(guó)在俄勒岡州的波蘭特市中心區(qū)建成第一個(gè)地源熱泵系統(tǒng)。能源價(jià)格低,這種系統(tǒng)并不經(jīng)濟(jì),因而未得到推廣。這一時(shí)期,歐洲建立了很多水平埋管式土壤源熱泵,主要用于冬季供暖。歐洲國(guó)家以瑞士、瑞典和奧地利等國(guó)家為代表,大。政府采取了相應(yīng)的補(bǔ)貼政策和保護(hù)政策,使得地。源熱泵生產(chǎn)和使用范圍迅速擴(kuò)大。地源熱泵生產(chǎn)呈現(xiàn)逐年上升趨勢(shì),瑞士和瑞典的年遞增。由于美國(guó)的氣候條件與中國(guó)很相似,因此研究美國(guó)的地源熱泵應(yīng)用情況,對(duì)。使室內(nèi)溫度保持在20℃左右,溫差在±1℃范圍內(nèi)。生故障時(shí),會(huì)及時(shí)報(bào)警。PLC即可編程控制器,是指以計(jì)算機(jī)技術(shù)為基礎(chǔ)的新型工業(yè)控制裝置。

  

【正文】 統(tǒng)工程股份有限公司 . HOLLiASLEC G3 系列小型一體化 PLC 硬件手冊(cè) [M]. [9] 北京和利時(shí)系統(tǒng)工程股份有限公司 .和利時(shí) G3 PLC 指令與功能塊手冊(cè) [M]. . [10] 謝汝鏞.地源熱泵系統(tǒng)的設(shè)計(jì) [A].殷平.現(xiàn)代空調(diào)第三輯 [c].北京 :中國(guó)建筑工業(yè)出版社 ,2020:33~ 74. [11] 顏愛(ài)斌.地源熱泵應(yīng)用的技術(shù)分析與思考 [J].天津城市建設(shè)學(xué)院學(xué)報(bào) ,2020,8(2):120—122. [12] 文力 ,黃翔 ,顏蘇芊.地源熱泵中央空調(diào)應(yīng)用的探完 [J].制冷與空調(diào) ,2020,2(4):52— 56. [13] 姬忠禮 , 泵和壓縮機(jī) [M].北京 :石油工業(yè)出版社 ,20201:115. [14] 王書(shū)敏 ,何可禹 , 離心式壓縮機(jī)技術(shù)問(wèn)答 (第二版 )[M].北京 : 中國(guó)石化總公司情報(bào)研究所 ,202051:120. [15] David R Dinse. Gethermal System for school [J].in: Ashrae. Journal, 1998, 1(5): 70 71. [16] Sulatisky M T. Ground source heat pumps in the Canadian prairies [J].in: Ashrae Transactions, 1991, 12(2):74 75. 36 致 謝 畢業(yè)論文正代表著大學(xué)的終結(jié),完成它既有一種收獲感,又有一種失落感,可無(wú)論如何它代表著我四年的努力,代表了我四年的歷程。當(dāng)它終于完工的時(shí)候,我不禁想起了很多人,很多事,尤其是辛勤培養(yǎng)我的老師們,謝謝你們 ! 感謝我的論文導(dǎo)師馬月輝 副教授 ,感謝馬 教授 在我的論文完成過(guò)程中給與的指導(dǎo)與幫助,讓我得 以順利地完成論文。感謝組里的每一位成員,你們的陪伴和幫助使我在完成畢業(yè)論文中節(jié)省很多時(shí)間和精力,少走了很多彎路。 感謝我走過(guò)四年青春的學(xué)校,傳授我知識(shí)的每一位老師,馬上就要走出校門(mén),走上工作崗位,我將帶著你們所傳授的技能去打拼,去奮斗,多謝你們。 感謝班里的每一位同學(xué),有你們的陪伴,讓我的四年生活更加光輝燦爛。感謝每一位認(rèn)識(shí)我和我認(rèn)識(shí)的同學(xué),有你們的存在,讓我的大學(xué)生活更加精彩。 在論文完成之際,也是畢業(yè)的前夕。在此,我的心情久久不能平靜,想起了很多讓我無(wú)法忘懷的事情,想起了所有幫助過(guò)我,鼓勵(lì)過(guò)我,陪伴過(guò)我 的老師和同學(xué)。在這里,請(qǐng)接受我最誠(chéng)摯的謝意。 37 附錄 A:英文資料 Introduce of the Ground source heat pump Types of Systems: There are two basic types of systems — those that require a flame to operate (.,bustion based), and those that do not. Most central systems presently installed create heat by bustion, just as they did in the early part of the century. These systems use a furnace to burn a fossil fuel (such as oil, natural gas or propane) or, in some instances, wood. More advanced, nonbustion systems operate by transferring or moving heat from one location to another. CombustionBased Systems: Until the last few years, bustionbased systems have been the preferred heating systems for home and business owners because of their moderate installation and operating costs, and wide availability in the market place. Unfortunately, there is a number of serious safety and related maintenance concerns with these systems. Some bustionbased systems present an explosion hazard if the storage or delivery of their fuel is not carefully controlled. Explosions due to improperly installed or maintained gas pipes and delivery systems are often in the news. Since these systems require a flame to operate, failures or improper installation of system ponents (for example, heat exchanger, damper, chimney, or flue) can result in property loss to fire. Fortunately, smoke detectors have saved many lives that might have been lost to fires caused by bustionbased heating systems. In addition to heat, bustionbased heating systems also create byproducts such as carbon monoxide. Carbon monoxide is a result of the inplete burning of fuel in bustionbased systems. Incorrectly installed systems, chimneys that are blocked by birds nests, or downdrafting can cause carbon monoxide to remain inside of buildings. This is especially dangerous in modern, wellsealed buildings, where it is difficult for outside bustion air to reach the furnace, and where carbon monoxide can be trapped and build up over time. Furnaces, water heaters, and other appliances must be properly vented outside. Combustionbased systems that deliver heat through ducts present occasional blasts 38 of hot air. This not only reduces fort directly, but tends to dehumidify the air. The addition of a central humidifier (with its associated installation, operating, and maintenance costs) can correct this humidity problem. Combustion based central heating systems are often coupled with lowefficiency central air conditioners. This raises installation and operating costs significantly, while adding an entirely separate unit to be maintained. Heat Transfer Systems: Nonbustion or heat transfer systems include heat pumps and geoexchange systems. Heat pumps operate by capturing heat from outdoor air and transferring it inside of a home or business. geoexchange systems capture and transfer heat from the earth. Nearly all heat transfer systems can be reversed, providing central cooling as well as heating. Some heat pumps and most geoexchange systems also provide domestic hot water at low operating costs. Heat Pumps: Beginning in the 1970s, airsource heat pumps came into mon use. They have the advantage of no bustion, and thus no possibility of indoor pollutants like carbon monoxide. Heat pumps provide central air conditioning as well as heating as a matter of course. And they are installationcost petitive with a central bustion furnace/central air conditioner bination. Heat pumps operate by moving or transferring heat, rather than creating it. During the summer, a heat pump captures heat from inside a home or business and transfers it to the outdoor air through a condensing unit. During the winter, the process is reversed. Heat is captured from outdoor air, pressed, and released inside. Much less electricity is used to move heat rather than create it, making heat pumps more economical than resistance heating. However, in all but the most moderate climates, the heating ability of the heat pump is limited by freezing outdoor temperatures. So electric resistance heat is used to supplement outdoorairsource heat pump during the coldest weather, preventing cold blow. Depending on climate, airsource heat pumps (including their supplementary resistance heat) are about to 3 times more efficient than resistance heating alone. Operating efficiency has improved since the 70s, making their operating cost generally petitive with bustionbased systems, depending on local fuel prices. With their outdoor unit subject to weathering, some maintenance should be expected. 39 Geoexchange Systems: More recently, even more advanced and efficient heating and cooling systems have emerged using the geoexchange process. Sometimes called geothermal or groundsource
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