共查询到18条相似文献,搜索用时 46 毫秒
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热泵循环海水淡化系统 总被引:1,自引:0,他引:1
对现有的热法海水淡化方法进行了节能评述,并提出一种综合了低温多效蒸馏与压汽蒸馏两种海水淡化方法技术优势的新系统,通过对此系统的设计计算,得出结论:本文提出的利用热泵循环的节能海水淡化系统能耗低,在热法海水淡化系统中最为节能。 相似文献
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海水热泵系统设计及技术经济分析 总被引:2,自引:0,他引:2
根据舟山地区的气候条件和海水条件,通过负荷计算、关键技术研究等环节初步设计了某船厂办公楼的海水热泵空调系统,估算了海水热泵空调系统的初投资发现,因为增加了海水取排水设施,所以单个项目经济性较差。但是海水源热泵空调具有非常明显的节能、减排、环保等综合社会效益,在能源日益紧缺、环境破坏严重的今天必将得到广泛应用。 相似文献
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水源热泵是一种高效节能、经济环保、安全稳定、冷暖两用、运行灵活的新型中央空调系统,它利用地表水(江、河、湖水)、地下水、工业废水及生活废水,又可用取之不尽的海水等,借助热泵系统,既能制冷、又能制热,是一种高效建筑节能技术。 相似文献
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This paper presents a study on the utilization of ocean thermal energy in Dalian. Coastal areas are ideal sites for the application of seawater-source heat pump technology (SWHP) to provide district cooling and heating. The technical requirements and the scheme design in the context of marine climate are discussed. A government-commissioned feasibility study of a proposed district energy site in Dalian, with an estimated 68 MW heating load and 76 MW cooling load plant capacity is then described. The economic, energy and environmental impacts are analyzed. In order to get a better understanding of economic justification and benefits of two different systems, annual cost (AC) and net present value (NPV), are used. A series of sensitivity analyses are undertaken to investigate the magnitude of the effect of the parameters variation on cost calculation. The numerical simulations of seawater temperature field are performed by using a two-dimensional convection–diffusion equation model to evaluate environmental impacts. Study indicates that Dalian has great potential for applying SWHP system. It is both technically and economically feasible because of the favorable geographical location and urban environment. 相似文献
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Based on energy conservation equation and Darcy’s law, a model of beach well infiltration intake system applied in a seawater source heat pump system was established. The model consists of the seawater seepage and the heat transfer process. A porous medium model in a software named FLUENT was applied to simulate the seepage and the heat transfer process. This model was also validated by field experiment conducted on the seashore in Tianjin, China. The maximum relative error between simulation results and experimental results was 2.1% (less than 5%), which was acceptable in engineering application. The porosity and coefficient of thermal conductivity of the aquifer soil were determined to be 0.49 W/(m·K) and 1.46 W/(m·K), respectively in the simulation. In addition, the influencing factors of pumping water of beach well were also analyzed. The pumping water was found to increase when the distance between the beach well and the impervious boundary becomes longer, when the distance between the beach well and the supplying water source shortens, when the diameter of the beach well enlarges, and the drawdown enlarges. 相似文献
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文章设计了一种专门用来制备淡水的冷凝器,以及一种间接冷凝换热制备淡水的联合海水淡化太阳能烟囱电站(SCPPSDIC)。以西班牙太阳能烟囱电站的几何参数为基础,对SCPPSDIC系统进行三维建模和数值模拟,并将模拟结果与单一太阳能烟囱电站(SCPP)的模拟结果进行对比分析。研究结果表明:SCPPSDIC的温度场、压力场沿烟囱中轴线呈对称分布,且变化较为平缓;相比于SCPP,SCPPSDIC的输出功率虽有4.2 k W的小幅度下降,但冷凝器区域能够析出3.95 t/h的淡水,淡水产出量极其可观,这使得太阳能综合利用率由1%以下提高到3.43%;冷凝器在制备淡水的同时,所放出的凝结热也会对流入蒸馏池的海水起到预热作用,从而使系统的能量得到充分利用。 相似文献
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A magnesium-solution phase catholyte semi-fuel cell (Mg-SFC) system was investigated as an energetic electrochemical system for low rate, long endurance undersea vehicle applications. This electrochemical system consisted of a magnesium anode and a solution phase catholyte of hydrogen peroxide or hypochlorite, in a seawater electrolyte. Polarization profiles of the Mg-SFC were performed to determine the corresponding voltages at applied current densities ranging from 10 to 50 mA cm−2. Voltages of 1.0 V to 1.8 V were observed at these current densities. Constant current-density tests at 25 mA cm−2 for 60 min were also performed to determine voltage stability with time. These tests showed voltages of 1.3 V when a magnesium anode and an electrocatalyst of nickel foil catalyzed with palladium and iridium were utilized. When an electrocatalyst of planar carbon catalyzed with palladium and iridium was tested, the corresponding voltage was 1.5 V. 相似文献
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Energy and freshwater shortage are the bottlenecks restricting China's economic development. The integration of energy utilization system and seawater desalination is considered as an innovative technology enabling efficient simultaneous use of middle or low temperature thermal energy and supply freshwater. Three feasible approaches to integrate seawater desalination with energy utilization system are presented in this paper, including combinations of the desalination process with a Combined Cooling Heating & Power system (CCHP), a power plant, or a solar thermal utilization system. In addition, the feasibility and advantages of a seawater desalination system combined with a power plant are described. The findings indicate that combining seawater desalination with industrial processes is a feasible and promising way to solve the problems of the lack of freshwater and low efficient use of low temperature thermal energy in coastland areas. 相似文献
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海水淡化技术的研究进展 总被引:2,自引:0,他引:2
淡水资源的紧缺已成为一个世界性问题。我国水资源匮乏,海水淡化包括西北地区的苦咸水淡化,将成为解决我国沿海地区和岛屿、华北和西北部分干旱地区等缺水问题的重要手段。海水淡化技术在国外已得到广泛应用,在我国也日趋重视。分析了海水淡化不同技术的原理、特点及其应用情况,指出与热力发电厂余热利用相结合的多效蒸馏法、多级闪蒸法将体现其明显的经济性,而且可在掌握系统技术的基础上,开发相应的成套设备。 相似文献