【文章內(nèi)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(duì)上述空調(diào)系統(tǒng)的缺點(diǎn)，筆者建議集中式新風(fēng)空調(diào)器只設(shè)預(yù)熱盤管，不設(shè)加濕器。大樓標(biāo)準(zhǔn)層的空調(diào)器只設(shè)冷卻盤管和高壓噴霧加濕器，而對(duì)于其它樓層有額定熱負(fù)荷的情況下再加設(shè)加熱盤管。該空調(diào)系統(tǒng)夏季運(yùn)行時(shí)，其空氣處理過程也如圖 3所示。而作為冬季運(yùn)行，新風(fēng)空調(diào)器只對(duì)室外新風(fēng)進(jìn)行預(yù)加熱，新回風(fēng)混合后進(jìn)入樓層空調(diào)器，空調(diào)器則根據(jù)控制要求對(duì)其加熱或冷卻（對(duì)于不同樓層，回 熱或冷卻可能同時(shí)存在）當(dāng)然，新風(fēng)加熱處理后溫度設(shè)定值的前提是大于+5176。C，且保證標(biāo)準(zhǔn)層空調(diào)器的入風(fēng)空氣狀態(tài) R2的焓值不低于 S點(diǎn)，避免其加熱過程。經(jīng)盤管后的空氣狀態(tài)點(diǎn)，其空氣處理過程如圖 4所示。該變風(fēng)量空調(diào)系統(tǒng)，由于充分利用了冬季室外新風(fēng)集中加濕而產(chǎn)生的大量冷熱抵消作用，是一種比較節(jié)能的空調(diào)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(duì)于變風(fēng)量空調(diào)系統(tǒng)，冬季和過渡季節(jié)運(yùn)行時(shí)需同時(shí)滿足內(nèi)外區(qū)的冷、熱負(fù)荷要求，故空調(diào)水系統(tǒng)采用四管制。由于系統(tǒng)要求同時(shí)提供冷、熱源，除采用常規(guī)的電動(dòng)制冷機(jī)組加蒸汽或熱水鍋爐外，可以 考慮采用直燃式溴化鋰?yán)錈岵粰C(jī)組，其具有運(yùn)轉(zhuǎn)時(shí)無振動(dòng)，無磨損，運(yùn)行經(jīng)濟(jì)可靠等優(yōu)點(diǎn)。不過，如采用直燃機(jī)組需注意以下幾個(gè)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(jī)組供水溫度 因?yàn)殇寤嚈C(jī)組的冷凍水供水溫一般只能達(dá)到 +7176。C左右，當(dāng)變風(fēng)量空調(diào)系統(tǒng)設(shè)計(jì)低溫系統(tǒng)時(shí)，系統(tǒng)需提供足夠低溫的冷凍水， 而這對(duì)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(jī)組需采用分隔式供熱機(jī)組 如果采用主體供熱式直燃機(jī)組，由于無法同時(shí)制冷和制熱，不能滿足變風(fēng)量空調(diào)系統(tǒng)需同時(shí)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(fù)荷運(yùn)行時(shí)只有內(nèi)區(qū)少量冷負(fù)荷，其總冷負(fù)荷大大低于夏季空調(diào) 時(shí)的總負(fù)荷，如在此低負(fù)荷情況下運(yùn)行，直燃機(jī)組將大大降低其運(yùn)行的經(jīng)濟(jì)性和可靠性。故此時(shí)，低負(fù)荷制冷由獨(dú)立的電動(dòng)冷水機(jī)組承擔(dān)為好，直燃機(jī)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(diào)水系統(tǒng)設(shè)計(jì)中，冷 卻塔可以設(shè)計(jì)采用獨(dú)立小塔不分彼此、統(tǒng)一組合的形式，所有冷卻塔風(fēng)機(jī)采用雙速風(fēng)機(jī)。實(shí)現(xiàn)運(yùn)行時(shí)，不管入塔水量及水溫如何變化，冷卻塔通過調(diào)節(jié)風(fēng)機(jī)風(fēng)量以保證出塔卻水的溫度，這樣可以有效降低冷卻塔的運(yùn)行能耗。由于變風(fēng)量空調(diào)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(dá)到不開冷水機(jī)能的節(jié)能空調(diào)運(yùn)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(fēng)量平衡 5, air volume balance 圖 5是典型的變風(fēng)量系統(tǒng)的經(jīng)濟(jì)運(yùn)行。對(duì)于采用混風(fēng)的空調(diào)系統(tǒng)，新風(fēng)量在各個(gè)房間是按風(fēng)量分配的。也就是說，即使總新風(fēng)量達(dá)到要求，在的房音也會(huì)有新風(fēng)不足的問題，