井結(jié)構(gòu)參數(shù)對(duì)同井回灌地下水源熱泵的影響

袁建偉*^,a    王瑞祥^a    袁東立^b   

(^a北京建筑工程學(xué)院環(huán)境與能源工程學(xué)院，北京100044)
(^b中國建筑科學(xué)研究院空氣調(diào)節(jié)所，北京100013)

摘要  同井回灌地下水源熱泵抽水和回灌在含水層同一徑向位置不同深度處同時(shí)發(fā)生，增加了熱貫通的可能性，因此對(duì)其影響因素的分析尤為重要。本文建立了單一介質(zhì)承壓含水層中定流量同井回灌地下水源熱泵夏季運(yùn)行地下水換熱數(shù)學(xué)模型，并模擬分析了含水層厚度、抽灌段濾管長度及其間距等井結(jié)構(gòu)參數(shù)對(duì)同井回灌地下水源熱泵地下水滲流和換熱的影響。

關(guān)鍵詞  地下水源熱泵；同井回灌；井結(jié)構(gòu)參數(shù)；抽水平均溫度

Effect of well structure parameters on Water-source Heat Pump with Pumping and Injection in the Same Well

Yuan Jianwei^a    Wang Ruixiang^a    Yuan Dongli^b

(^aDept. of environment & Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044)
(^bInstitute of Air conditioning, China Academy of Building Research, Beijing 100013)

Abstract Pumping and injection of a groundwater heat pump with pumping and recharging in the same well (GWHPPRSW) occurs simultaneously at the same plane spot but at different depth of aquifer, which increases the probability of thermal breakthrough. So, it is highly important to analyze its factors. A model was established for groundwater heat transfer in a unitary homogenous confined aquifer by the operation of GWHPPRSW in summer with constant heat pump flow. Based on the model, a numerical simulation was done for the GWHPPRSW in condition of different thickness of the aquifer; the length of filters; the distance of the filters between the pumping section and the injection one.

Keywords water-source heat pump; pumping and injection in the same well; well structure parameters; pumping average temperature

0 引言

近年來，國內(nèi)學(xué)者們提出了一種具有自主知識(shí)產(chǎn)權(quán)的新型地下水源熱泵，該熱泵生產(chǎn)井與回灌井集成在同一口井中。相對(duì)于傳統(tǒng)的異井回灌地下水源熱泵，該熱泵被稱為同井回灌地下水源熱泵。該技術(shù)自2001年在北京某工程投入運(yùn)行以來，其推廣與應(yīng)用速度很快，到2006年底已完成250多個(gè)項(xiàng)目，總建筑面積超過360萬m^2[1]。圖1為該新型地下水源熱泵的示意圖。

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井結(jié)構(gòu)參數(shù)對(duì)同井回灌地下水源熱泵的影響.rar