本文選題：熱電制冷　切入點(diǎn)：液冷服　出處：《山東大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：高溫輻射及環(huán)境溫度過(guò)高導(dǎo)致人體不能夠及時(shí)散熱是威脅高溫作業(yè)人員身體健康的主要原因。液體冷卻服系統(tǒng)是一種液體介質(zhì)在服裝內(nèi)流動(dòng)并維持工作人員體表適宜溫度的個(gè)體防護(hù)裝備,是高溫作業(yè)人員和穿著密閉式防護(hù)服的工作人員為吸收身體熱負(fù)荷所必備的服裝系統(tǒng)。液冷服系統(tǒng)主要包括液冷服裝和微型制冷系統(tǒng)兩部分,在微型制冷系統(tǒng)的冷源制冷方式中,熱電制冷技術(shù)因其結(jié)構(gòu)緊湊、無(wú)運(yùn)動(dòng)部件、無(wú)制冷劑等優(yōu)點(diǎn)在個(gè)體熱防護(hù)中有非常廣泛的應(yīng)用和發(fā)展前景。 本文在基本理論的基礎(chǔ)上采用數(shù)學(xué)方法對(duì)某一特定的熱電制冷模型進(jìn)行性能影響因素分析,得出熱電元件的尺寸因子、熱電材料的優(yōu)值系數(shù)、工作電流和冷熱端的換熱強(qiáng)度等參數(shù)對(duì)熱電制冷裝置性能的影響。理論分析表明,制作熱電制冷元件時(shí),應(yīng)選擇優(yōu)值系數(shù)高的熱電材料和選取合適的尺寸因子G值。在實(shí)際的運(yùn)行中,工作電流存在最佳的取值可以使熱電制冷裝置的制冷性能最好,同時(shí),冷熱端的結(jié)構(gòu)優(yōu)化設(shè)計(jì)對(duì)制冷性能的提高也起著至關(guān)重要的作用。本文的理論分析為熱電制冷產(chǎn)品的開(kāi)發(fā)設(shè)計(jì)和實(shí)際熱電制冷裝置的優(yōu)化設(shè)計(jì)及運(yùn)行提供了理論基礎(chǔ)。 針對(duì)熱電制冷裝置的冷熱端的不同結(jié)構(gòu)和所輸入的功率兩項(xiàng)參數(shù)分別進(jìn)行了實(shí)驗(yàn)研究,以得出最佳的冷熱端的結(jié)構(gòu)和最佳的運(yùn)行工況。熱端的結(jié)構(gòu)分別使用翅片散熱、熱管散熱和水冷散熱,冷端的結(jié)構(gòu)使用兩種結(jié)構(gòu)不同的儲(chǔ)冷水箱,分別對(duì)輸入電壓為5.5V、6.5V、7.5V、8.5V和9.5V五種不同運(yùn)行工況進(jìn)行實(shí)驗(yàn)研究。實(shí)驗(yàn)結(jié)果表明,在一定的輸入功率范圍內(nèi),無(wú)論冷熱端的換熱強(qiáng)度如何,隨著輸入功率的增大,制冷量增大,而制冷系數(shù)減小。在一定的范圍內(nèi),提高冷熱端的換熱強(qiáng)度均可以提高制冷量和制冷系數(shù)。對(duì)于熱端的散熱結(jié)構(gòu),水冷散熱效果最好,熱管散熱效果次之,翅片散熱效果最差；對(duì)于冷端的儲(chǔ)冷結(jié)構(gòu),微通道水箱效果最好。 根據(jù)理論分析和實(shí)驗(yàn)所得的結(jié)果,完成熱電制冷模塊的設(shè)計(jì)。熱端采用熱管散熱器,冷端采用微通道水箱,測(cè)試表明該制冷模塊可以提供185W的制冷量,提供16℃以上的冷水。同時(shí),本文給出控制系統(tǒng)的框架設(shè)計(jì),為今后溫控系統(tǒng)的設(shè)計(jì)和液冷服的舒適性實(shí)驗(yàn)提供參考。
[Abstract]:High temperature radiation and excessive ambient temperature are the main causes that threaten the health of high temperature workers. Liquid cooling clothing system is a kind of liquid medium flowing in clothing and maintaining the surface of staff. Personal protective equipment suitable for temperature, It is an essential clothing system for high temperature workers and staff wearing closed protective clothing to absorb the heat load of the body. The liquid-cooled clothing system mainly includes two parts: liquid-cooled clothing and micro-refrigeration system. In the refrigeration mode of micro refrigeration system, thermoelectric refrigeration technology has been widely used and developed in individual thermal protection because of its compact structure, no moving parts, no refrigerant and so on. Based on the basic theory, a mathematical method is used to analyze the factors affecting the performance of a particular thermoelectric refrigeration model, and the dimension factor of thermoelectric element and the coefficient of excellent value of thermoelectric material are obtained. The influence of the working current and the heat transfer intensity on the performance of the thermoelectric refrigeration device. The theoretical analysis shows that, when the thermoelectric refrigeration element is made, The thermoelectric material with high coefficient of excellence should be selected and the appropriate size factor G should be chosen. In actual operation, the optimum value of working current can make the refrigeration performance of thermoelectric refrigeration equipment the best, at the same time, The theoretical analysis of this paper provides a theoretical basis for the development and design of thermoelectric refrigeration products and the optimal design and operation of practical thermoelectric refrigeration devices. In order to obtain the optimum structure of the hot and cold end and the optimal operating condition, the structure of the hot and cold end of the thermoelectric refrigeration unit is studied by experiments, and the structure of the hot end uses fins to dissipate heat, respectively, in order to obtain the optimum structure of the hot end and the structure of the hot end. Heat pipe cooling and water cooling heat dissipation, the cold end structure uses two kinds of different structure storage cold water box, the input voltage is 5.5 V, 6.5 V, 7.5 V, 8.5 V and 9.5 V respectively. The experimental results show that, within a certain input power range, the input voltage is 5.5 V, 6.5 V, 8.5 V and 9.5 V, respectively. Regardless of the heat transfer intensity at the cold and hot ends, with the increase of the input power, the refrigerating capacity increases and the refrigeration coefficient decreases. The cooling capacity and cooling coefficient can be increased by increasing the heat transfer intensity of the cold and hot end. For the heat dissipation structure of the hot end, the heat dissipation effect of water cooling is the best, the heat dissipation effect of heat pipe is second, the heat dissipation effect of fin is the worst, and the cold storage structure at the cold end. The effect of microchannel water tank is the best. According to the theoretical analysis and experimental results, the design of thermoelectric refrigeration module is completed. The hot end adopts heat pipe radiator and the cold end adopts microchannel water tank. The test results show that the cooling module can provide a refrigerating capacity of 185W. At the same time, the frame design of the control system is given, which provides a reference for the design of the temperature control system and the experiment of the comfort of the liquid-cooled suit in the future.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TB657

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