【文章內容簡介】 ntage that all floor air conditioner cooling coil, the air conditioner will focus on the winter heating and humidification process of outdoor air. So, simplifies the whole building air conditioning system, also greatly save the initial investment cost of the system. But its disadvantage is that, for the sake of the concentration of indoor air humidification, must wait for its first wet heat, and the floor air conditioner mix the wind to its air cooling processing to achieve a required for air conditioning wind the wind state points at a time. So the air handling process, it is bound to produce air heating cooling of offset function, the first building air conditioning system operation energy consumption caused by a large number of waste. 針對上述空調系統(tǒng)的缺點，筆者建議集中式新風空調器只設預熱盤管，不設加濕器。大樓標準層的空調器只設冷卻盤管和高壓噴霧加濕器，而對于其它樓層有額定熱負荷的情況下再加設加熱盤管。該空調系統(tǒng)夏季運行時，其空氣處理過程也如圖 3所示。而作為冬季運行，新風空調器只對室外新風進行預加熱，新回風混合后進入樓層空調器，空調器則根據控制要求對其加熱或冷卻（對于不同樓層，回 熱或冷卻可能同時存在）當然，新風加熱處理后溫度設定值的前提是大于+5176。C，且保證標準層空調器的入風空氣狀態(tài) R2的焓值不低于 S點，避免其加熱過程。經盤管后的空氣狀態(tài)點，其空氣處理過程如圖 4所示。該變風量空調系統(tǒng)，由于充分利用了冬季室外新風集中加濕而產生的大量冷熱抵消作用，是一種比較節(jié)能的空調形式。 Faults in the air conditioning systems, the author suggested that the centralized air conditioner preheating coil only. Do not set the humidifier. Building standard layer of air conditioner cooling coil pipe and highpressure atomizing humidifier, only for the other floors are rated heat load cases and added a heating coil. The operation of the air conditioning system in summer, the air handling process is as shown in figure 3. In winter operation, air conditioner only for fresh air preheating, the new return air mixture into the floor air conditioner, air conditioner, according to the requirements of control on the heating or cooling (for different floors, heat or cooling may exist), of course, fresh after the heat treatment temperature set point is the premise of greater than + 5 176。 C, and guarantee the standard layer air conditioner state of wind into the air enthalpy value of R2 is not lower than S points, avoid the heating process. After the coil of the air condition, the air handling process as shown in figure 4. The variable air volume air conditioning system, due to take full advantage of the concentration of winter outdoor air humidification and produce large amounts of hot and cold offset function, is a energysaving air conditioning form. 冷熱源 4, cold and heat source 對于變風量空調系統(tǒng)，冬季和過渡季節(jié)運行時需同時滿足內外區(qū)的冷、熱負荷要求，故空調水系統(tǒng)采用四管制。由于系統(tǒng)要求同時提供冷、熱源，除采用常規(guī)的電動制冷機組加蒸汽或熱水鍋爐外，可以 考慮采用直燃式溴化鋰冷熱不機組，其具有運轉時無振動，無磨損，運行經濟可靠等優(yōu)點。不過，如采用直燃機組需注意以下幾個問題： For variable air volume air conditioning system, in winter and transition seasons runtime needs to satisfy both inside and outside the cold, heat load requirement, so the air conditioning water system consists of four controls. Due to the system requirements at the same time provide cold and heat source, in addition to the use of the conventional electric refrigeration unit and steam or hot water boiler, consider using directfired lithium bromide cold heat is not set, it has operation, no vibration, no wear, economic and reliable operation, etc. However, if use direct bustion unit should pay attention to the following questions: * 機組供水溫度 因為溴化鋰機組的冷凍水供水溫一般只能達到 +7176。C左右，當變風量空調系統(tǒng)設計低溫系統(tǒng)時，系統(tǒng)需提供足夠低溫的冷凍水， 而這對于溴化鋰組而言就難以勝任了。 * unit water supply chilled water temperature for lithium bromide units for water temperature can reach + 7 176。 C or so monly, when a variable air volume air conditioning system design of the system of low temperature and system needs to provide enough low temperature of chilled water, and that it would be difficult to petent for lithium bromide group. * 直燃機組需采用分隔式供熱機組 如果采用主體供熱式直燃機組，由于無法同時制冷和制熱，不能滿足變風量空調系統(tǒng)需同時提供冷、熱源的要求。 * direct bustion units should use space type heating units if the main body heating type, direct bustion unit due to cooling and heating at the same time, can39。t satisfy the variable air volume air conditioning system, cold/heat source requirements shall be supplied at the same time. * 配置低負荷運行時只有內區(qū)少量冷負荷，其總冷負荷大大低于夏季空調 時的總負荷，如在此低負荷情況下運行，直燃機組將大大降低其運行的經濟性和可靠性。故此時，低負荷制冷由獨立的電動冷水機組承擔為好，直燃機組只作制熱用。 * configuration when only a small amount of cooling load in inner zone of operation under low load, the total cooling load is much lower than the total load of air conditioning in summer, such as the low load running, direct bustion unit will greatly reduce the efficiency and reliability of its operation. Therefore, low cooling load borne by independent electric chiller for good, only direct bustion unit for heating. 在空調水系統(tǒng)設計中，冷 卻塔可以設計采用獨立小塔不分彼此、統(tǒng)一組合的形式，所有冷卻塔風機采用雙速風機。實現運行時，不管入塔水量及水溫如何變化，冷卻塔通過調節(jié)風機風量以保證出塔卻水的溫度，這樣可以有效降低冷卻塔的運行能耗。由于變風量空調系統(tǒng)冬季亦需提供冷源，可考慮在室外空氣條件允許的情況下，利用冷卻塔的冷卻能力，通過板式熱交換器，提供一定低溫的冷凍水，以達到不開冷水機能的節(jié)能空調運行。 In the design of air conditioning water system, cooling tower can be designed using independent small tower regardless of each other, bination in the form of unity, all adopt doublespeed fan cooling tower fan. Implementation is run, no matter how into the water tower and water temperature changes, the cooling tower by adjusting the fan air volume to ensure that the tower is the temperature of the water, it can effectively reduce energy consumption of the operation of the cooling tower. Because variable air volume air conditioning system also must provide cold source in winter, can consider in the case of outdoor air conditions allow, using the cooling capacity of cooling tower, through the plate heat exchanger, provide a low temperature of chilled water, in order to achieve the function of energy saving air conditioning don39。t open cold water running. 風量平衡 5, air volume balance 圖 5是典型的變風量系統(tǒng)的經濟運行。對于采用混風的空調系統(tǒng)，新風量在各個房間是按風量分配的。也就是說，即使總新風量達到要求，在的房音也會有新風不足的問題，