【正文】 I 摘要 該設計對象位于鄭州市黃河路與未來路交叉口，它是一個商務中心的空調末端系統(tǒng)及冷凍熱力站的設計。主要內容包括：負荷計算、空氣處理過程和風量的設計與計算、設備選型、風系統(tǒng)與水系統(tǒng)阻力計算以及系統(tǒng)控制方案的確定等。在設計中應結合建筑的具體特點制定合理的空調運行方案，在符合實際情況的前提下盡量使系統(tǒng)具備更強的功能性和可操作性。本設計中，空調系統(tǒng)分為兩類：一類為全空氣一次回風系統(tǒng)；另一類為風機盤管加獨立新風系統(tǒng)，新風處理到室內焓值，不承擔室內負荷。冷凍熱力站內，夏季制冷采用螺桿式冷水機組作為冷源，冬季供暖采用城市 管網作為熱源，并通過板式換熱器換熱。制冷機房布置于地下室，冷卻塔設置在建筑物裙房屋頂，水系統(tǒng)選擇閉式同程兩管制變流量系統(tǒng)。 關鍵詞： 空調系統(tǒng)，空氣處理過程，風機盤管加獨立新風，板式換熱器 II Airconditioning System Design for Zhengzhou Yujie Business Building Abstract The object of this design is an airconditioning terminal system with the refrigeration and thermal station of a standard business center which is located in Zhengzhou city. The main content includes: the load putation, the design and calculation of the air treatment process and the air flow, the selection of the equipments, the friction calculation of the wind and aqueous system and the determination of the systematic control strategies, etc. Combined with the specific characteristics of the architecture in the process of the design, the rational operation scheme should be formulated to make the system possess better functionality and operability in accordance with practical situation. The airconditioning system is divided into two kinds: one is the system of primary air return, and the other is the system of the fancoil unit with independent fresh air that the outdoor wind is treated to reach the indoor enthalpy, but not to bear the indoor load. In the refrigeration and thermal station, I adopt the screw water chiller to refrigerate in summer as well as the urban pipeline to transfer heat in winter through the plate heat exchanger. The generator room is fixed up in the basement, while the chilling tower is installed on the top of the podium of the building. As for the aqueous system, the closed, synchro, twopipe and variant flow one is chosen. Keywords: Airconditioning system Air treatment process The fancoil unit with independent fresh air Plate heat exchanger III 目錄 引言 ................................................................. 1 1. 工程概況及原始資料 ............................................... 2 工程概況 .................................................... 2 氣象參數 .................................................... 2 室外計算參數 .......................................... 2 室內設計參數 .......................................... 3 建筑材料簡介 ................................................ 4 2. 負荷計算 ......................................................... 5 室內冷負荷計算 .............................................. 5 墻體和屋面?zhèn)鳠岬脽嵋鸬睦湄摵?........................ 5 玻璃窗傳熱得熱引起的冷負荷 ............................ 5 玻璃窗日射得熱引起的冷負荷 ............................ 5 內維護結構形成的冷負荷 ................................ 6 照明散熱引起的冷負荷 .................................. 6 人體散熱引起的冷負荷 .................................. 7 設備散熱引起的冷負荷 .................................. 7 室外新風引起的冷負荷 .................................. 8 室內熱負荷計算 ............................................. 13 通過圍護結構的溫差傳熱量形成的熱負荷 ................. 13 附加耗熱量形成的熱負荷 ............................... 13 外門開啟沖入冷風耗熱量形成的熱負荷 ................... 13 新風熱負荷 ........................................... 14 3. 空調方案的確定 .................................................. 17 空調系統(tǒng)的 分類 ............................................. 17 按負擔室內負荷所用介質種類分類 ....................... 17 按空氣處理設備的設置情況分類 ......................... 18 空調方案的比較 ............................................. 18 各種空調系統(tǒng)使用條件和使用特點 ....................... 18 常用空調系統(tǒng)比較 ..................................... 19 IV 空調系統(tǒng)使用指標概括比較 ............................. 21 空調方案的確定 ............................................. 21 4. 風量計算 ........................................................ 24 送風量的確定 ............................................... 24 新風量的確定 ............................................... 24 滿足衛(wèi)生要求 ......................................... 24 補充局部排風量 ....................................... 25 保證空調房間的正壓要求 ............................... 25 5. 空氣調節(jié)設備的選擇 .............................................. 26 空氣處理機組的選擇 ......................................... 26 空調機組選型方法 ..................................... 26 空調機組選型結果 ..................................... 26 風機盤管機組的選擇 ......................................... 27 風機盤管 機組選型結果 ................................. 27 6. 空調系統(tǒng)的設計計算 .............................................. 29 風系統(tǒng)的阻力計算 ........................................... 29 風管設計的基本任務 ................................... 29 風管的選擇 ........................................... 29 風管內風速的選擇 ..................................... 29 氣流組織和送風形式 ................................... 30 計算方法 ............................................. 31 計算結果 ............................................. 31 水系統(tǒng)的阻力計算 ........................................... 33 水系統(tǒng)形式的分類 ..................................... 33 水系統(tǒng)形式的確定 ..................................... 34 計算方法 ............................................. 34 冷凍水系統(tǒng)設計計算 ................................... 35 冷卻水系統(tǒng)設計計算 ................................... 40 冷凝水系統(tǒng)管路設計 ................................... 40 7. 冷凍熱力站 設計 .................................................. 42 水冷式冷水機組的選擇 ....................................... 42 V 制冷機組選擇依據 ..................................... 42 制冷機組選型方案 ..................................... 44 板式換熱機組的選擇 ......................................... 45 冷卻塔的選擇 ............................................... 45 定壓裝置的選擇 ............................................. 46 集水器、分水器的選擇 ....................................... 47 軟水器的選擇 ............................................... 47 軟化水箱的選擇 ............................................. 48 除污器的選擇 ............................................... 48