【正文】 。 制冷設備選用 機組的 制冷量為 620kW。 本工程主機選用風冷熱泵機組。本文分析了提高熱泵機組本身的能效比以節(jié)能、改進除霜控制邏輯以減少不必要的除霜而導致的能耗、增加熱回收等節(jié)能手段以降低能耗、采用雙級壓縮以拓寬熱泵的使用范圍等措施 ,對于促進風冷熱泵機組更廣泛的應用具有積極的意義。 關鍵詞： 空調(diào)， 熱泵， 通風， 火鍋店 ，設計 河 北 聯(lián) 合 大 學 畢 業(yè) 設 計 說 明 書 II Abstract The air conditioning and ventilation system for the chafing dish restaurant of feng huagn yuan in Tangshan was designed, incluiding scheme parision, load calculation, air process selection, equipment selection, water system and air system design, and appurtenances selection. The design specifications and the construction drawing was worked out. The summer cold load is kW, and the winter heat load kW in this project. Two water cooling screw rod type cold water units whose refrigeration quantity is 620kW were selected for refrigeration. The city heat source was used for heating. The hot water 95℃ /70℃ was changed to 60℃ /50℃ with disc heat interchanger, and then supplying the air conditioning . The Air cooled heat pump is choosed for the main engine in this project. Air cooled heat pump is energysaving,watersaving and environmentalfriendly can be fully used both in summer and it also get some disadvantages like providing less heating capacity at low ambient temperature,heavy frost in high humidity regions,etc,which hinders it from application in north of this paper the author analyzed to increase ASHP COP for energy saving,improving defrost control logic to reduce power consumption due to the unnecessary defrost,add functions like heat recovery to reduce power consumption,use two stage pression to broaden its application,which is very beneficent to the perfection of ASHP. The FCU+PAU system was selected for the project. The direct return system， the primary pump system and the variable current quantity system was selected for the water system after the analysis and parison. 河 北 聯(lián) 合 大 學 畢 業(yè) 設 計 說 明 書 III Key words: air conditioning, ventilation, library, design河 北 聯(lián) 合 大 學 畢 業(yè) 設 計 說 明 書 IV 目 錄 第一章 緒 論 ................................................................................................................. 1 背景介紹 .................................................................................................................... 1 設計內(nèi)容 ..................................................................................................................... 2 原始資料 ..................................................................................................................... 2 工程概況 ................................................................................................................. 2 氣象參數(shù) .................................................................................................................. 2 土建資料 .................................................................................................................. 2 圍 護結構傳熱系數(shù) .................................................................................................. 3 參數(shù)確定 .................................................................................................................... 3 設計目的 ..................................................................................................................... 4 第二章 方案初定 ........................................................................................................... 5 方案設計內(nèi)容 ............................................................................................................. 5 空調(diào)設計負荷概算 ..................................................................................................... 5 室內(nèi)設計參數(shù) ............................................................................................................. 5 空調(diào)冷、熱源系統(tǒng)與設備選擇 ................................................................................. 5 選擇冷熱源系統(tǒng)的基本原則 .................................................................................. 5 制冷設備的選擇 ...................................................................................................... 6 換熱設備的選擇 ...................................................................................................... 7 空調(diào)系統(tǒng)的選擇 ......................................................................................................... 7 空調(diào)系統(tǒng)設計的基本原則 ...................................................................................... 7 空調(diào)方案的確定 ...................................................................................................... 8 水系統(tǒng)的選擇 ............................................................................................................. 9 冷卻設備初步設計 .................................................................................................. 9 開閉選擇 .................................................................................................................. 9 管制的選擇 .............................................................................................................. 9 定、變水量選擇 .................................................................................................... 10 同、異程選擇 ........................................................................................................ 10 水泵初步設計 ........................................................................................................ 10 第三章 冷負荷的計算 ................................................................................................... 11 房間負荷計算方法 ................................................................................................... 12 新風負荷計算 ........................................................................................................... 18 第四章 空氣處理過程 ................................................................................................... 20 風機盤管系統(tǒng)的處理過程 ................................