地下水源热泵系统中回灌能力分析

近年,地下水源热泵技术在我国被广泛应用,并在节能、环保等方面取得了一定效益。但是,回灌问题仍是困扰我国地下水源热泵发展的瓶颈。以唐山市丰润区乡居假日住宅区A4区地下水源热泵系统的应用为例,从区域水文地质条件方面,对水源热泵系统中地下水回灌能力进行了分析,指出开展地下水源热泵项目时,掌握热源井所在区域水文地质条件的重要性。探讨了影响地下水回灌能力的关键因素,其中包括区域水文地质条件、热源井成井工艺、回灌井阻塞以及地下水回灌方式。     

成都平原区地源热泵系统适宜性分区评价

成都平原区位于四川省盆地中部,享有“天府之国”的美誉.近年来,响应国家节能、环保的号召,地源热泵中央空调系统在成都平原区有着较快的发展,但对区内的地源热泵系统热能交换形式缺少适宜性的分区,在选择系统热能交换形式上缺少依据.根据成都平原区地源热泵系统热能交换形式对其适宜性进行初步划分,以供成都平原区热泵系统热能交换形式选择提供依据     

地源热泵设计参数原位热响应测试的方法及实验

以电加热器作为热源的热响应测试仪,仅能进行夏季制冷工况测试,参数设定以经验为主。应用了以热泵作为冷/热源、可测试冬季供暖工况的原位热响应测试仪进行测试实验,结果表明:热泵输出功率稳定,测试功率在夏季制冷工况和冬季供暖工况宜分别设为40～60 W/m和35～45 W/m;热响应测试时间不宜少于48 h,若模型精度要求高于2.5%,需根据地层情况适当延长测试时间;野外测试的冬季供暖工况下热交换孔的热阻为0.08(m.℃)/W,100 m深度内岩土体的综合导热系数为1.67 W/(m.℃)。测试结果可满足地源热泵系统设计要求。     

海洋生物泵研究进展

海洋生物泵是以一系列海洋生物为介质将大气中的碳输运到海洋深层的过程,是海洋碳循环的重要组成部分以及未来的研究重点。本文系统地描述了海洋生物泵碳汇几个主要阶段:浮游植物沉降,浮游动物粪球颗粒沉降,透明胞外聚合颗粒物(TEP)沉降和海雪沉降以及碳酸盐反向泵过程。同时,本文对南海生物泵的研究进展进行简要介绍,服务于中国海碳循环。     

北京地区地源热泵系统地质条件评估工作浅谈

本文介绍了北京地区地源热泵系统地质条件评估工作的相关背景,详细阐述了地质条件评估的本质是把客观真实的地质、热工技术认识与项目可研工作的要求结合起来,深刻分析了地质条件对地源热泵系统项目应用的适合性,风险性和可行性的影响,提出地源热泵系统技术具有典型的双刃剑特征,仍有许多技术问题值得深入思考和研究。     

集安市浅层地热能开发利用可行性评价

通过水文地质调查、水文地质钻探、水文地质试验方法对集安市潜层地热能开发条件进行评价。根据水文地质试验结果及地下水位动态资料,评价区为不适宜区。通过计算可以得到较适宜开发区的地下水换热功率,单位面积地热能容量及地热能储量,为评价区开发利用规划制定技术支撑。     

Geotechnical properties of sediments from Walvis ridge,deep sea drilling project,leg 75, hole 532a∗

During Leg 75 of the Deep Sea Drilling Project (DSDP) from the D/V Glomar Challenger, a 200‐m deep hole was drilled at Hole 532A on the eastern side of Walvis Ridge at a water depth of 1331 m. Sediment cores were obtained by means of a hydraulic piston corer. All of the cores from this boring were designated for geotechnical studies and were distributed among eight institutions. The results of laboratory studies on these sediment cores were compiled and analyzed. Sediment properties, including physical characteristics, strength, consolidation, and permeability were studied to evaluate changes as a function of depth of burial. It was concluded that the sediment profile to the explored depth of 200 m at Walvis Ridge consists of approximately 50 m of foram‐nannofossil marl (Subunit la) over 64 m of diatom‐nannofossil marl (Subunit 1b) over nannofossil marl (Subunit lc) to the depth explored. All three sediment units appear to be normally consolidated, although some anomalies seem to exist to a depth of 120 m. No distinct differences were found among the sediment properties of the three subunits (la, 1b, and lc) identified at this site.     

Research on rotating speed’s influence on performance of Deep-Sea lifting motor pump based on DEM-CFD

Abstract

Metal minerals in deep sea are considered to be the most important mineral resources in the 21st century. With the development of science and technology, deep-sea mining has gained more and more attention, and the pipeline lifting method is the most promising for mining. It is particularly important to use the pump as a key component in the pipeline upgrading. In this paper, the DEM–CFD method is used to study the solid–liquid two-phase fluid flow in the Deep-Sea lifting motor pump. Data about the distribution of pressure on the suction surface and pressure surface as well as the distribution of particles in the pump under different rotation speed can be obtained. Tests verify the efficiency and head of the pump by numerical simulation. It provides a theoretical method for the study of solid–liquid two-phase fluid flow in deep-sea mining.     

DZ-200型多功能钻机研制及其在浅层地埋管孔施工中的应用

针对地埋管孔工程的施工需求,并兼顾工程勘查、锚固施工等施工工艺要求,研发了一种轻型、高效、适用于回转、冲击回转等多种钻进工艺的DZ-200型多功能钻机。主要介绍了该钻机的结构特点、技术参数以其在地源热泵浅层地埋管孔施工中的应用效果。     

安阳枫林水郡小区水源热泵热源井的设计与施工

地下水源热泵系统应用中最突出的问题是回灌效率低、地下水资源浪费。分析认为造成回灌效率低的主要原因之一是热源井设计和施工工艺不合理。为此,在安阳枫林水郡小区热源井设计和施工中分别采用了增大桥式过滤管的数量、桥高、滤料粒径和填砾厚度等措施,回灌量明显增加,实现了1抽1回的目标。既解决了回灌效率低、资源浪费的问题,又大幅降低了工程投资和运行成本。