预埋与绑扎埋管形式能量桩传热特性研究

发布时间：2018-06-08 18:55

本文选题：能量桩 + 埋管形式　；参考：《岩土力学》2017年02期

【摘要】：预埋钢管能量桩是一种新型桩埋管形式的地源热泵技术,然而,针对其特殊埋管形式下传热特性的研究却相对较少。针对预埋钢管单U型埋管能量桩的传热管-钢管-混凝土-桩周土的传热特性开展模型试验和数值模拟研究,测得在热-冷循环温度荷载作用下预埋钢管单U型埋管能量桩桩体及桩周土体的温度变化规律;为了对比分析,同时开展了传统绑扎单U型埋管能量桩的传热特性模型试验,并分析了预埋钢管能量桩的适用性。研究结果表明,预埋钢管能量桩的传热性能略低于绑扎埋管能量桩的传热性能;夏季工况两种埋管形式能量桩桩体温度和桩周土体温度最终变化量分别相差23%和16%左右;冬季工况该数值约为14%和18%左右。
[Abstract]:Pre-buried steel tube energy pile is a new type of ground-source heat pump technology with pile-buried pipe. However, the research on heat transfer characteristics under special buried pipe form is relatively rare. The model test and numerical simulation of heat transfer tube-concrete-pile-surrounding soil heat transfer characteristics of single U-type buried steel tube energy pile are carried out. The temperature variation of single U-shaped buried steel tube energy pile and surrounding soil is measured under the action of thermal-cold cycle temperature load, and the model test of heat transfer characteristics of traditional single U-shaped buried pipe energy pile is carried out in order to compare and analyze. The applicability of pre-buried steel tube energy pile is analyzed. The results show that the heat transfer performance of the pre-buried steel tube energy pile is slightly lower than that of the bundled tube energy pile, and the final variation of the body temperature of the two kinds of buried pipe energy pile and the soil temperature around the pile is about 23% and 16% respectively in summer. In winter, the values are about 14% and 18%.
【作者单位】：重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点实验室;河海大学土木与交通学院;香港科技大学土木与环境工程系;
【基金】：重庆市研究生科研创新项目资助(No.CYB16013) 国家自然科学基金项目(No.51378178,No.51306080) 山地城镇建设与新技术教育部重点实验室开放基金(No.0902071812401)~~
【分类号】：TU473.1;TU83

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