Research on ground heat exchanger of Ground Source Heat Pump technique

Ground Source Heat Pump technique and its operating principle are described in this paper. Ground heat exchanger is the key technique of ground source heat pump and its pattems are discussed. Software is helpful to design ground heat exchanger. A project of Chinese Ground Source Heat Pump is introduced and its market is more and more extensive.     

孟加拉湾的叶绿素a,海表温度和风速的趋势

孟加拉湾（BoB）是一个高能量活跃的地区,其短期内的动态变化将对浮游环境产生巨大影响."风泵"能够在BoB海域导致垂直的混合从而影响海表温度和叶绿素浓度.本文对2006——2016年的月平均Aqua-MODIS叶绿素a （chl-a）浓度数据和Sea WiFS月度气候态数据进行了分析,研究了叶绿素浓度的时间/季节变化和温度以及风速的关系.基于季风期间的chl-a变异与海表温度（SST）,评估了在BoB海域它们之间的关系和变化.chl-a浓度值的趋势分析表明,该区域的垂直混合非常低,冬季最高,夏季最低.冬季最大chl-a浓度值为0.50 mg/m³,并且从2月开始下降到夏季季风期间.与冬季季风相比,夏季季风期间叶绿素表现出较低的浓度.在夏季季风期间,特别是在7月和8月,由于云层密集,卫星传感器无法准确捕获chl-a浓度值.chl-a浓度和SST之间相关系数R²值为0.218 1.     

郑州市地下水源热泵应用适宜性与环境影响分析

本文在分析郑州市现有地温空调系统应用的基础上,从水文地质条件、浅层地温场特征、经济效益等方面分析了郑州市地下水源热泵应用的适宜性,研究了热泵运行对地下水环境的影响,认为地下水源热泵应用效果较好,经济社会效益明显,适宜推广应用,为城市地下水源热泵发展应用提供了依据。     

A local model for analysis of pump and treat systems with vertical barrier walls

We present a mathematical model of local, steady groundwater flow near a vertical barrier wall. Flow features represented in the model include an impermeable arc-shaped barrier wall and multiple wells; distant boundary conditions are not included explicitly, but their effects on the local flow field are modelled by specifying a uniform flow at infinity and a constant areal recharge within a local domain. We develop an explicit closed-form solution to the boundary-value problem using the analytic element method. The solution is an extension of a harmonic solution presented by Anderson and Mesa [Anderson EI, Mesa E. The effects of vertical barrier walls on the hydraulic control of contaminated groundwater. Adv Water Resourc 2006;29(1):89–98] which does not include the effects of recharge. We demonstrate that the general solution with recharge consists of the harmonic solution superposed on a special case of the harmonic solution along with two elementary one-dimensional flow solutions. The results are used to investigate the effects of areal recharge on the capture zone envelopes of the pumping wells and on the reduction in discharge that can be achieved by including a barrier wall in a pump and treat design. We find that the benefits of including an open barrier wall in a design, measured as a reduction in the pumping rate required to contain a plume, increase for higher recharge rates. Dimensionless plots of capture zone envelopes are presented for a practical well and barrier wall configuration.     

光纤测温技术在地温场监测中的应用

换热功率计算通常采取热响应试验的方式,仅仅通过热响应试验方式无法直观反映地下不同介质换热性能的差异,光纤测温系统恰恰能弥补这种不足。光纤测温监测与热响应试验相结合这种新技术的应用,在黄泛平原尚属首次,论文通过热响应试验期间的光时域光纤监测,取得了翔实数据的基础上,对比分析了不同岩土层介质的换热性能,采取了光纤地温测量这种新型监测手段,对换热试验前及试验期间地温场变化进行了监测,对合理利用浅层地温能这种新能源提供了参数支持。     

Hydrodynamics of an oscillating water column seawater pump: Part I: theoretical aspects

A wave-driven seawater pump, composed of a resonant and an exhaust duct joined by a variable-volume air compression chamber, is studied. The time dependent form of Bernoulli's equation, adapted to incorporate losses due to friction, vortex formation at the mouths and radiation damping, describes the pump behaviour. A dimensional analysis of the pump equations shows that a proposed scale-model will perform similar to a full-scale seawater pump. Fluid oscillations in the ducts perform similar to a damped, two-mass spring system, excited by the waves. A resonant condition can be maintained, for different wave frequencies, by varying the volume of air in the compression chamber. The dimensional analysis shows that the basic behaviour of the pump is linear and that its performance can be significantly increased by optimising the design of the duct mouths. Linear estimates of the resonant air chamber volume and flow rate through the pump are derived.     

On the tuning of a wave-energy driven oscillating-water-column seawater pump to polychromatic waves

Performance of wave-energy devices of the oscillating water column (OWC) type is greatly enhanced when a resonant condition with the forcing waves is maintained. The natural frequency of such systems can in general be tuned to resonate with a given wave forcing frequency. In this paper we address the tuning of an OWC sea-water pump to polychromatic waves. We report results of wave tank experiments, which were conducted with a scale model of the pump. Also, a numerical solution for the pump equations, which were proven in previous work to successfully describe its behavior when driven by monochromatic waves, is tested with various polychromatic wave spectra. Results of the numerical model forced by the wave trains measured in the wave tank experiments are used to develop a tuning criterion for the sea-water pump.     

我国青藏高原气候动力学研究的近期进展

文章回顾了我国在青藏高原气象学的基础上发展起来的青藏高原气候动力学研究的近期进展；指出了青藏高原“感热驱动气泵(SHAP)”在调制东亚季风及全球气候中的重要作用；在强调全球海陆分布所产生的“四叶型”加热L0SECOD激发出夏季副热带基本环流型的基础上指出高原的隆升增强了东亚季风的北伸；论述与青藏高原抬升相联系的高原负涡度源所激发的Rossby波对全球气候异常的影响，指出春季青藏高原的表面感热加热是造成东亚环流季节突变的重要原因，并导致亚洲夏季风首先在孟加拉湾东部地区爆发；还就进一步发展青藏高原气候动力学问题作了探讨。     

IP-1型离子泵测氦仪及其在放射性水化找矿中的初步试验

讨论了IP—1型离子泵测氦仪的工作原理及基本技术特性。通过野外工作,证明仪器具有性能比较稳定、灵敏度较高,便于携带等特点。介绍了仪器在已知铀矿床上开展放射性水化学找矿的试验结果。测量资料表明,在有利的地质、水文地质条件下,水氦异常能较好的指明深部铀矿化范围。     

欧亚地形对夏季南亚大气环流日变化影响的数值模拟研究

利用大气科学和地球流体力学数值模拟国家重点实验室（LASG）气候模式F-GOALS的大气谱分量SAMIL，设计了有、无欧亚地形的对比试验，并与NCEP/NCAR再分析资料进行比较，通过分析其流场、高度场、温度和涡度的差异，得到欧亚大陆地形对夏季大气环流场日变化的影响特征。结果表明，欧亚大陆地形对大气环流和气候日变化的影响主要集中在青藏高原地区。由于青藏高原上空大气对太阳辐射加热场的日变化最为敏感，随着日间加热场的增强，热力适应造成白天高原低层大气气旋性环流加深，相应地使周边地区向高原辐合增强，引起高原地区日间的上升运动更为强盛，而使大气高层反气旋环流增强，引起高原上空向外辐散气流增强。也就是地形效应在白天增强了高原“感热气泵”的效率，使其产生明显的日变化，随之带来高原及周边地区局地环流强烈的日变化。由于上升运动的日变化，引起高原南部地区降水的日变化，同时降水的增加正反馈于上升运动，使得上升运动在高原南部地区日变化尤为强烈。