本文選題：電廠循環(huán)水　切入點(diǎn)：吸收式熱泵　出處：《華北電力大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：本文通過(guò)建立模型比較吸收式熱泵與壓縮式熱泵回收循環(huán)余熱的熱經(jīng)濟(jì)性,建立熱經(jīng)濟(jì)學(xué)模型比較采用吸收式熱泵系統(tǒng)供熱與抽汽供熱的經(jīng)濟(jì)性；經(jīng)計(jì)算本項(xiàng)目選擇吸收式熱泵技術(shù)對(duì)原大型供熱機(jī)組提出技改方案。再對(duì)熱泵系統(tǒng)進(jìn)行能量平衡分析,提出對(duì)于熱泵系統(tǒng)的節(jié)能效果計(jì)算方法及修正方法,并針對(duì)該改造項(xiàng)目的熱泵系統(tǒng)提出具體可行的測(cè)試方案,根據(jù)測(cè)試結(jié)果分析核算節(jié)能量。得到結(jié)論有：第一,根據(jù)熱經(jīng)濟(jì)性評(píng)價(jià)模型,定義了電能的轉(zhuǎn)換系數(shù)k,結(jié)合本項(xiàng)目與參數(shù)λ計(jì)算比較,得出在本項(xiàng)目采用吸收式熱泵的熱經(jīng)濟(jì)性高于壓縮式熱泵;第二,用熱經(jīng)濟(jì)學(xué)的方法評(píng)價(jià)了吸收式熱泵供熱與抽汽供熱的熱經(jīng)濟(jì)性,結(jié)合具體項(xiàng)目計(jì)算得出采用吸收式熱泵提供的熱水的單位熱經(jīng)濟(jì)學(xué)成本為6.02元/kWh,而采取傳統(tǒng)抽汽供熱時(shí)提供的熱水的單位熱經(jīng)濟(jì)學(xué)成本為6.25元/kWh,故在本項(xiàng)目采用吸收式熱泵供熱比傳統(tǒng)抽汽供熱的成本更低。第三,提出了具體改造方案：以4#汽輪機(jī)五段抽汽作為驅(qū)動(dòng)熱源,利用10臺(tái)吸收式熱泵回收電廠4#機(jī)組循環(huán)水余熱,將熱網(wǎng)回水加熱至80℃左右,再通過(guò)原有加熱系統(tǒng)加熱,送入大網(wǎng)供熱系統(tǒng)。第四,以能量平衡理論為依據(jù),提出了對(duì)于熱泵系統(tǒng)的節(jié)能效果計(jì)算方法及修正方法,即在系統(tǒng)自身電耗及機(jī)組真空引起經(jīng)濟(jì)性下降等不能忽略的能量修正方法,并對(duì)該項(xiàng)目進(jìn)行測(cè)量和計(jì)算分析,計(jì)算得出該吸收式熱泵系統(tǒng)年節(jié)約標(biāo)準(zhǔn)煤量約為25701.2噸。結(jié)果表明,采用熱泵系統(tǒng)可節(jié)約能源,提高整個(gè)機(jī)組的供熱能力。這將為在城市供熱面積不斷擴(kuò)大的情況下,提高供熱機(jī)組的適應(yīng)能力,是一種切實(shí)可行的工程應(yīng)用方案。
[Abstract]:In this paper, the heat economy of absorption heat pump and compression heat pump is compared with that of absorption heat pump, and the heat economy of absorption heat pump system is compared with that of absorption heat pump system. Through the calculation, the absorption heat pump technology is selected to put forward the technical innovation scheme for the original large heat supply unit. Then the energy balance analysis of the heat pump system is carried out, and the calculation method and the correction method for the energy saving effect of the heat pump system are put forward. According to the test results, the energy saving is analyzed. The conclusions are as follows: first, according to the thermal economic evaluation model, The conversion coefficient k of electric energy is defined and compared with the calculation of parameter 位. It is concluded that the heat economy of absorption heat pump is higher than that of compression heat pump in this project. The thermal economy of absorption heat pump heating and extraction heating is evaluated by thermoeconomics. The unit thermoeconomics cost of using absorption heat pump to provide hot water is 6.02 yuan / kWhand that of traditional extraction heat supply is 6.25 yuan / kWh. therefore, the cost of unit thermoeconomics is 6.25 yuan / kWh. in this project, the unit thermoeconomics cost of using absorption heat pump to provide hot water is 6.25 yuan / kWh. Absorption heat pump heating is cheaper than traditional extraction heating. Third, The specific retrofit scheme is put forward: taking the five-stage extraction steam of the steam turbine as the driving heat source, using 10 absorption heat pumps to recover the residual heat of circulating water in the power plant, heating the backwater of the heat network to about 80 鈩，

本文編號(hào)：1621489