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首页> 外文期刊>Science and Technology for the Built Environment >Experimental development of natural convection heat transfer correlations for spiral-helical surface water heat exchangers (1385-RP)
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Experimental development of natural convection heat transfer correlations for spiral-helical surface water heat exchangers (1385-RP)

机译：螺旋螺旋地表水热交换器自然对流传热相关性的实验开发（1385 rp）

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摘要

Surface water heat pump systems utilize surface water bodies, such as lakes, reservoirs, and rivers, as heat sources and heat sinks. Closed-loop surface water heat pumps use submerged heat exchangers to extract or reject heat from the surface water body. Heat transfer between the heat exchanger and the lake is generally governed by buoyancy driven natural convection. One form of surface water heat exchanger is the spiral-helical heat exchanger, which is usually fabricated from high-density polyethylene tubing. Though the exterior convective resistance is an important part of the design calculation, convection correlations suitable for spiral-helical surface water heat exchangers are not available. In the current article, the authors cover an experimental study involving heat rejection experiments and heat extraction experiments on nine different spiral-helical configurations with three different high-density polyethylene tube sizes. Standard high-density polyethylene and thermally enhanced high-density polyethylene heat exchangers were also tested and compared. Convection correlations for spiral-helical heat exchangers were developed for heat extraction and heat rejection conditions. Heat transfer rate predicted with the correlations is compared against experimental data.
机译：地表水热泵系统利用地表水体，如湖泊，水库和河流，作为热源和散热器。闭环表面水热泵使用浸没式热交换器从地表水体中提取或拒绝热量。热交换器和湖泊之间的传热通常由浮力驱动的自然对流控制。一种形式的表面水热交换器是螺旋螺旋型热交换器，其通常由高密度聚乙烯管制成。尽管外部对流性是设计计算的重要组成部分，但适用于螺旋螺旋表面水热交换器的对流相关性。在本文的文章中，作者涵盖了一种涉及含有三种不同高密度聚乙烯管尺寸的九种不同螺旋螺旋配置的散热实验和热提取实验的实验研究。还测试了标准高密度聚乙烯和热增强的高密度聚乙烯热交换器并进行比较。开发用于热萃取和热排斥条件的螺旋螺旋热交换器的对流相关性。将相关性预测的传热速率与实验数据进行比较。

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