【摘要】：轉(zhuǎn)輪式熱回收型間接蒸發(fā)冷卻裝置，是另一種新型的熱回收設(shè)備，可對室內(nèi)排風(fēng)中蘊含的冷（熱）量進(jìn)行有效回收，提高能源利用效率，降低空調(diào)系統(tǒng)中處理新風(fēng)的供冷（熱）量，是一種節(jié)能效果明顯的空調(diào)方式。 轉(zhuǎn)輪式熱回收型間接蒸發(fā)冷卻裝置是室內(nèi)排風(fēng)經(jīng)過填料式直接蒸發(fā)冷卻段，處理后的排風(fēng)再經(jīng)過轉(zhuǎn)輪的一個半圓，需要處理的新風(fēng)流經(jīng)轉(zhuǎn)輪的另一個半圓。夏季，排風(fēng)將蘊含的冷量釋放給顯熱蓄熱芯體，排風(fēng)溫度升高，芯體的溫度降低，熱的新風(fēng)接觸到冷的顯熱蓄熱芯體時，由于存在溫度差，顯熱芯體將冷量釋放給新風(fēng)，新風(fēng)溫度降低；冬季則利用排風(fēng)中蘊含的熱量對新風(fēng)進(jìn)行預(yù)熱。 為了提高整機的換熱效率，在轉(zhuǎn)輪式間接蒸發(fā)冷卻段的基礎(chǔ)上，有機地結(jié)合了直接蒸發(fā)冷卻段，使得機組的出風(fēng)溫度更逼近于室外空氣的濕球溫度，甚至于室外空氣的露點溫度，進(jìn)而提出了轉(zhuǎn)輪式熱回收型間接-直接蒸發(fā)冷卻空調(diào)機組。 首先從理論上對機組、轉(zhuǎn)輪式熱交換器的結(jié)構(gòu)特征、工作原理進(jìn)行了分析，將不同的室外狀態(tài)點在焓濕圖上進(jìn)行了5個分區(qū)，分析了不同區(qū)域使用該機組中各個功能段的應(yīng)用形式，從理論上分析了3～10月烏魯木齊、西安、南通使用蒸發(fā)冷卻的時間占總運行時間的比例分別為93.6%，79.7%，75%；對設(shè)計風(fēng)量3000m3/h空調(diào)機組采用轉(zhuǎn)輪式間接蒸發(fā)冷卻段、填料式直接蒸發(fā)冷卻段進(jìn)行設(shè)計及設(shè)備選型。 為深入分析實驗樣機的性能，分別做了其在中等濕度地區(qū)、高濕度地區(qū)夏季工況下的換熱性能的測試，此外也做了轉(zhuǎn)輪式熱回收型間接蒸發(fā)冷卻器在冬季工況下?lián)Q熱性能的測試，結(jié)果表明： （1）在模擬中等濕度地區(qū)室外氣象條件下的運行測試，得出結(jié)論： a)在此實驗范圍內(nèi)，單獨開啟轉(zhuǎn)輪式間接蒸發(fā)冷卻段，轉(zhuǎn)輪式間接段最佳二次、一次風(fēng)風(fēng)量比為1.1，效率可達(dá)到78.5%。 b)整機開啟，使轉(zhuǎn)輪式間接段二次風(fēng)、一次風(fēng)風(fēng)量比為1.1，整機的溫降為14.66℃，出風(fēng)溫度介于室外空氣的濕球溫度和露點溫度之間。 （2）在高濕度地區(qū)（南通）室外氣象條件下的運行測試，得出結(jié)論： 整機在轉(zhuǎn)輪式間接段風(fēng)量比β取1.1運行時，機組的總溫降是最大的，，可達(dá)到5.98℃；此時轉(zhuǎn)輪式間接段的效率為74%，機組的終溫可逼近室外空氣的露點溫度。 （3）轉(zhuǎn)輪式熱回收型間接蒸發(fā)冷卻器在冬季的換熱效果，得出結(jié)論： 當(dāng)取轉(zhuǎn)輪式熱回收型間接蒸發(fā)冷卻器經(jīng)濟(jì)排風(fēng)、新風(fēng)風(fēng)量比為1.0時，室外新風(fēng)溫度為8.3℃，室內(nèi)回風(fēng)溫度為26℃，熱交換效率為75.3%。 （4）根據(jù)實際測試結(jié)果預(yù)測了在烏魯木齊地區(qū)某大型超市（3～10月）采用轉(zhuǎn)輪式兩級蒸發(fā)冷卻空調(diào)機組比傳統(tǒng)機械制冷可節(jié)省50%的運行費用。
[Abstract]:The indirect evaporative cooling device of rotary heat recovery type is another new heat recovery equipment, which can effectively recover the cold (heat) quantity contained in the indoor exhaust air and improve the energy utilization efficiency. Reducing the cooling (heat) of fresh air in air conditioning system is a kind of energy saving air conditioning method. The indirect evaporative cooling device of runner type heat recovery type is that the indoor exhaust air passes through the packing type direct evaporative cooling section, the treated exhaust air passes through a half circle of the runner, and the fresh air that needs to be treated flows through the other half circle of the runner. In summer, the cooling amount contained in the exhaust air is released to the sensible heat storage core. When the exhaust air temperature rises, the core temperature decreases. When the hot fresh air comes into contact with the cold sensible heat storage core, because of the difference in temperature, the sensible heat core releases the cold amount to the fresh air. The temperature of the fresh wind is lowered, and the heat contained in the exhaust air is preheated in winter. In order to improve the heat transfer efficiency of the whole machine, the direct evaporative cooling section is organically combined on the basis of the indirect evaporative cooling section of the runner, so that the outlet air temperature of the unit is closer to the wet bulb temperature of the outdoor air. Even for the dew point temperature of outdoor air, the indirect-direct evaporative cooling air conditioning unit with rotary heat recovery is put forward. Firstly, the structural characteristics and working principle of the unit and runner heat exchanger are analyzed theoretically, and the different outdoor state points are divided into five zones on the enthalpy and humidity diagram. This paper analyzes the application forms of each functional section of the unit used in different regions, and theoretically analyzes the proportion of evaporative cooling time to the total operating time of Urumqi, Xi'an and Nantong from March to October, respectively, which is 93.60.79.775. The indirect evaporative cooling section of runner type and the direct evaporative cooling section of packing type are used in the design of 3000m3/h air conditioning unit and the equipment selection is carried out. In order to deeply analyze the performance of the experimental prototype, the heat transfer performance of the prototype was tested in the medium humidity region and in the high humidity area in summer. In addition, the heat transfer performance of the indirect evaporative cooler with rotary heat recovery is tested under the winter conditions. The results show that: (1) the test results are as follows: (1) the performance of the indirect evaporative cooler is tested under the simulated outdoor weather conditions in the medium humidity area. The conclusions are as follows: a) in this experimental range, the runner type indirect evaporative cooling section is opened alone, and the runner indirect section is optimized for the second time. The primary air volume ratio is 1.1, and the efficiency can reach 78.5%. B) the whole machine is opened. The ratio of primary air to secondary air is 1.1, and the temperature of the whole machine is 14.66 鈩

本文編號：2134918