本文關(guān)鍵詞： 全熱交換器 交換芯材 導(dǎo)熱性能 透濕性能 氣流分布均勻性 結(jié)構(gòu)優(yōu)化　出處：《青島理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：在經(jīng)濟發(fā)展和全球性能源危機的雙重因素下，人們一方面對室內(nèi)空氣品質(zhì)的要求提高，另一方面又大力提倡節(jié)能減排，所以在暖通空調(diào)領(lǐng)域，就形成了節(jié)約能源和改善室內(nèi)空氣質(zhì)量的矛盾；全熱交換器作為解決這個矛盾的理想設(shè)備之一，具有廣闊的應(yīng)用前景，備受國內(nèi)外的關(guān)注。 為提高國內(nèi)全熱交換器產(chǎn)品的熱回收效率，進而提高產(chǎn)品的市場競爭力，本文針對國內(nèi)市場一種常見板翹式全熱交換器，從芯體通道構(gòu)型到全熱交換芯材再到整體結(jié)構(gòu)進行了系統(tǒng)深入的研究，主要工作及結(jié)論如下： （1）本文采用數(shù)值模擬的方法研究了芯體通道構(gòu)型、翅片二次換熱面對交換效率的影響。結(jié)果表明：對于板翹式全熱交換器，應(yīng)考慮波紋板所形成的二次換熱面，且正三角形流道較其他通道構(gòu)型性能更佳；并且采用高導(dǎo)熱翅片材料可以有效的提高全熱交換器的交換效率。 （2）本文使用熱線法測量設(shè)備，結(jié)合設(shè)計制作的芯材熱質(zhì)交換性能測試實驗裝置，對芯材的導(dǎo)熱性能及濕擴散性能進行了研究，并結(jié)合SEM圖，分析了微觀結(jié)構(gòu)對芯材吸濕行為的影響，，結(jié)果表明：芯材的含水率影響芯材的導(dǎo)熱系數(shù)，同時發(fā)現(xiàn)內(nèi)部結(jié)構(gòu)整齊，有納米孔口，且空隙分布均勻的芯材有良好的透濕性能；研究結(jié)果為高效導(dǎo)熱透濕膜的設(shè)計提供了依據(jù)。 （3）采用實驗與數(shù)值模擬相結(jié)合的方法研究了芯體迎風面氣流分布對換熱效率的影響。研究發(fā)現(xiàn)，全熱交換器在實際的應(yīng)用過程中，由于入口段結(jié)構(gòu)不合理產(chǎn)生漩渦、回流等現(xiàn)象，使得芯體迎風面的氣流分布是不均勻的，且這種不均勻性會降低全熱交換器的換熱效率；這也表明優(yōu)化全熱交換器流道結(jié)構(gòu)來改善芯體迎風面的氣流分布均勻性對換熱效率的提高也極為重要。 （4）本文建立了全熱交換器綜合測試實驗臺，并根據(jù)前文的分析，提出了全熱交換器的結(jié)構(gòu)改進思想，并在實驗臺上對改進方案做了對比分析，結(jié)果表明：這種新型全熱交換器結(jié)構(gòu)能夠有效的提高換熱效率。 本文對全熱交換器的研究提出了一些新思路，為其優(yōu)化設(shè)計提供了理論參考，對全熱交換器的進一步發(fā)展具有重要的指導(dǎo)意義。
[Abstract]:In the dual factors of economic development and global energy crisis, people on the one hand to improve indoor air quality, on the other hand, vigorously promote energy conservation and emission reduction, so in the field of HVAC. The contradiction between saving energy and improving indoor air quality is formed. As one of the ideal equipments to solve this contradiction, total heat exchanger has a broad application prospect and has attracted much attention at home and abroad. In order to improve the heat recovery efficiency of domestic total heat exchanger products and improve the market competitiveness of the products, this paper aims at a kind of common plate tilting type total heat exchanger in the domestic market. The main work and conclusions are as follows: (1) the structure of the core is studied from the core channel configuration to the total heat exchange core material and then to the whole structure. The main work and conclusions are as follows: In this paper, the effects of core channel configuration and finned secondary heat transfer on the exchange efficiency are studied by numerical simulation. The results show that: for plate tilting type total heat exchanger. The secondary heat transfer surface formed by the corrugated plate should be considered, and the triangular channel has better performance than other channels. And the exchange efficiency of total heat exchanger can be improved effectively by using high heat conduction finned material. In this paper, the thermal conductivity and wet diffusion properties of the core materials are studied by using the hot-wire measuring equipment and the heat and mass exchange test equipment designed and made, and the SEM diagram is combined. The effect of microstructure on moisture absorption behavior of core material is analyzed. The results show that the moisture content of core material affects the thermal conductivity of core material. The core with uniform void distribution has good moisture permeability. The results provide a basis for the design of high efficiency heat and moisture permeable film. (3) the effect of the air flow distribution on the heat transfer efficiency on the upwind surface of the core is studied by using the method of experimental and numerical simulation. It is found that the total heat exchanger is in the practical application process. Due to the phenomenon of vortex and reflux in the inlet section, the airflow distribution on the upwind surface of the core is not uniform, and the heat transfer efficiency of the whole heat exchanger will be reduced by the inhomogeneity. It also shows that it is very important to optimize the flow channel structure of total heat exchanger to improve the uniformity of air flow distribution on the upwind surface of the core for the improvement of heat transfer efficiency. In this paper, the comprehensive test bench of total heat exchanger is established, and according to the analysis above, the idea of structure improvement of total heat exchanger is put forward, and the improved scheme is compared and analyzed on the test bench. The results show that the new structure of total heat exchanger can effectively improve the efficiency of heat transfer. In this paper, some new ideas are put forward for the research of total heat exchanger, which provides a theoretical reference for its optimal design, and has important guiding significance for the further development of total heat exchanger.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU83

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