本文選題：多熱源 + 吸收式熱泵��； 參考：《浙江大學(xué)》2014年博士論文

【摘要】：蒸氣壓縮式熱泵系統(tǒng)需要消耗珍貴的電能,且常用制冷劑還會嚴(yán)重破壞臭氧層并產(chǎn)生全球變暖效應(yīng),以熱能為驅(qū)動(dòng)動(dòng)力且使用環(huán)境友好型工質(zhì)對的吸收式熱泵系統(tǒng)可以極大緩解城市電力緊張和保護(hù)環(huán)境而受到人們的歡迎。傳統(tǒng)的吸收式系統(tǒng)以及一些改進(jìn)型的吸收式系統(tǒng)大都是由單一熱源驅(qū)動(dòng),且對熱源溫度的要求也不同,很難同時(shí)利用低溫太陽能熱和地?zé)嵋约肮I(yè)生產(chǎn)中存在的大量動(dòng)力余熱。為此本文提出一種多熱源驅(qū)動(dòng)吸收式熱泵系統(tǒng),高低壓發(fā)生器通過噴射器相互耦合,在能夠以較簡單結(jié)構(gòu)高效利用動(dòng)力余熱的基礎(chǔ)上,將傳統(tǒng)單效吸收式系統(tǒng)無法利用的低品位太陽能熱作為聯(lián)合驅(qū)動(dòng)熱源。 開展了多熱源驅(qū)動(dòng)吸收式熱泵循環(huán)的理論研究,分析發(fā)生壓力對系統(tǒng)制冷/制熱性能的影響,結(jié)果表明為了得到最優(yōu)的性能,高壓發(fā)生器發(fā)生壓力和低壓發(fā)生器發(fā)生壓力以及噴射系數(shù)均需要優(yōu)化,并分析了循環(huán)在變工況下的優(yōu)化性能參數(shù)。制冷工況下,高壓發(fā)生器發(fā)生壓力在最優(yōu)值正負(fù)偏離5K.Pa的范圍內(nèi),循環(huán)COP都保持在0.9以上,說明該循環(huán)的可用性能較好。動(dòng)力余熱與太陽能負(fù)荷之比在3.5以上時(shí),多熱源驅(qū)動(dòng)吸收式循環(huán)的COP都在0.9以上,較傳統(tǒng)單效吸收式循環(huán)效率高20%左右,節(jié)能效果顯著。 分析了輸入相同動(dòng)力余熱與低溫太陽能熱負(fù)荷的條件下,采用多熱源驅(qū)動(dòng)吸收式循環(huán)所產(chǎn)生的制冷量/制熱量遠(yuǎn)大于一套傳統(tǒng)單效循環(huán)與一套傳統(tǒng)兩級循環(huán)所產(chǎn)生的制冷量/制熱量和,采用多熱源循環(huán)可以大大簡化系統(tǒng)設(shè)備,大大減小了設(shè)備制造成本。 將整個(gè)循環(huán)看作由動(dòng)力余熱驅(qū)動(dòng)子循環(huán)與太陽能驅(qū)動(dòng)子循環(huán)組成,理論計(jì)算出太陽能負(fù)荷與動(dòng)力余熱負(fù)荷之比最大值,負(fù)荷比最大值隨工況變化而變化。 設(shè)計(jì)并搭建了多熱源驅(qū)動(dòng)吸收式熱泵系統(tǒng)實(shí)驗(yàn)臺,實(shí)驗(yàn)研究了裝置的制冷及制熱性能,主要包括以高壓發(fā)生器煙氣入口溫度、低壓發(fā)生器Ⅱ太陽能熱水入口溫度、蒸發(fā)器冷媒水出口溫度(制冷工況)、冷凝器空調(diào)熱水出口溫度(制熱工況)為自變量,研究這些自變量與系統(tǒng)內(nèi)部參數(shù)如：發(fā)生溫度、蒸發(fā)溫度、冷凝溫度的變化關(guān)系,以及對系統(tǒng)制冷量／制熱量和性能系數(shù)的影響。實(shí)驗(yàn)研究表明,系統(tǒng)制冷量/制熱量理論模擬結(jié)果與實(shí)驗(yàn)結(jié)果符合較好。當(dāng)煙氣溫度213℃時(shí),系統(tǒng)提供6℃的冷媒水,制冷量可以達(dá)到12.5kW,制冷系數(shù)達(dá)到了0.78。系統(tǒng)提供43.5℃的空調(diào)末端熱水,制熱量可以達(dá)到26.6kW,制熱系數(shù)超過了1.7,實(shí)現(xiàn)了低品位能源高效和充分利用,為多熱源驅(qū)動(dòng)吸收式熱泵系統(tǒng)的設(shè)計(jì)以及規(guī)�；瘧�(yīng)用奠定了基礎(chǔ)。
[Abstract]:Vapor compression heat pump systems consume valuable electrical energy, and common refrigerants can seriously damage the ozone layer and produce global warming effects. The absorption heat pump system, which is driven by heat energy and uses environment-friendly working pairs, can greatly alleviate the power shortage and protect the environment. The traditional absorption system and some improved absorption systems are driven by a single heat source, and the requirements of the heat source temperature are different. It is difficult to simultaneously utilize the low-temperature solar heat and geothermal energy, as well as a large amount of power waste heat in industrial production. In this paper, a multi-heat source driven absorption heat pump system is proposed, in which the high and low pressure generator is coupled with each other by ejector, and the power waste heat can be utilized efficiently with simple structure. The low-grade solar heat which can not be used in the traditional single-effect absorption system is used as the combined driving heat source. The theoretical study of absorption heat pump cycle driven by multi-heat source is carried out, and the influence of the pressure on the refrigeration / heating performance of the system is analyzed. The results show that in order to obtain the optimal performance, The generation pressure of high voltage generator and the pressure of low pressure generator as well as the injection coefficient need to be optimized, and the optimal performance parameters of the cycle under variable operating conditions are analyzed. Under the refrigeration condition, the cop of the cycle keeps above 0.9 in the range of positive or negative deviation of the optimal value from 5K.Pa, which indicates that the availability of the cycle is better. When the ratio of power waste heat to solar energy load is more than 3.5, the cop of absorption cycle driven by multiple heat sources is more than 0.9, which is about 20% higher than that of traditional single-effect absorption cycle. Under the condition of input the same power waste heat and low temperature solar heat load, The refrigerating capacity / heating capacity generated by using multi-heat source driven absorption cycle is much larger than that of one set of traditional single-effect cycle and one set of traditional two-stage cycle. The system equipment can be greatly simplified by using multi-heat source cycle. The equipment manufacturing cost is greatly reduced. The whole cycle is regarded as the maximum value of the ratio of the solar energy load to the power residual heat load, and the maximum value of the load ratio varies with the working condition. The experiment bench of multi-heat source driven absorption heat pump system is designed and built. The refrigeration and heating performance of the device is studied experimentally, including the inlet temperature of flue gas of high pressure generator and the inlet temperature of solar hot water of low pressure generator. The outlet temperature of refrigerant water in evaporator (refrigerating condition) and the outlet temperature of hot water in condenser air conditioning (heating condition) are independent variables. The relationship between these independent variables and internal parameters of the system such as occurrence temperature, evaporation temperature and condensation temperature is studied. And the influence on the cooling capacity / heating capacity and performance coefficient of the system. The experimental results show that the theoretical simulation results of the cooling capacity / heating capacity of the system are in good agreement with the experimental results. When the flue gas temperature is 213 鈩，

本文編號：2014718