EPRI: Direct Contact Heat Exchange and Absorption Refrigeration Based on Green Non-volatile Ionic Liquids for Enhanced Dry Cooling of Thermoelectric Power Plants

EPRI：基于绿色非挥发性离子液体的直接接触换热吸收式制冷，用于热电厂强化干冷

• 批准号: 1358034
• 负责人: Yongho Ju
• 金额: $ 60.52万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-04-15 至 2019-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1358034&HistoricalAwards=false
• 关键词: EPRI; Direct; Contact; Heat; Exchange

1358034Ju There is an urgent need to minimize or possibly eliminate industrial usage of freshwater. It has been estimated that thermoelectric power production withdraws close to 40% of freshwater in the US. Currently available dry cooling methods with zero water consumption have found very limited usage ( 2%) due to the high capital cost, large footprints/weight, and low thermal efficiency. Therefore, research toward developing innovative alternative dry cooling methods that are economical are need to facilitate their broad adoption. This will eliminate the water withdrawal for cooling in power generation. The research at UCLA will develop a new class of technology called DIrect-contact Liquid-on-String Heat Exchangers (DILSHE) for dry cooling of a steam power plant. A key feature of the DILSHE is the use of inexpensive and light-weight materials, making it highly economical and easily transportable. High heat transfer effectiveness is achieved using thin films of non-volatile liquids flowing over a dense array of parallel strings while reducing associated gas flow pressure drop. Another feature of DILSHE is its modular design; this allows multiple units to be stacked together to form large cooling units, with each module being field readily serviceable and/or replaceable.The research proposes to conduct systematic experimental and theoretical investigation to establish scientific and engineering foundation for rigorous design and optimization of the DILSHE. It will improve and apply advanced fluid mechanical and thermal metrology tools and techniques for studying the instability of gravity-driven thin liquid film flows and associated enhancement in mass, momentum, and energy transport. Comprehensive survey and preliminary screening of non-volatile heat transfer liquids will also be conducted to facilitate exploration of their novel use not only in the proposed DILSHE but also other heat transfer applications. The research will also build and test a lab scale prototype (25 kW capacity) to validate the proposed design and to facilitate further commercial development of the technology.The project will also include dedicated efforts to involve undergraduate and graduate students from under-represented groups. K-12 STEM education will be promoted by developing innovative programs for high-school students based on a cradle-to-career philosophy that leverages the research components of the project in coordination with UCLA's outreach offices. The project will also include efforts to promote engineering business opportunities, which, when instilled early on, will help promote an entrepreneurial spirit that resonates with the youth in the United States.

迫切需要最大限度地减少或可能消除淡水的工业使用。 据估计，在美国，热电生产消耗了近40%的淡水。 由于高资本成本、大占地面积/重量和低热效率，目前可用的零水消耗的干式冷却方法的使用非常有限（2%）。因此，需要研究开发经济的创新替代干式冷却方法，以促进其广泛采用。这将消除发电中用于冷却的水提取。加州大学洛杉矶分校的这项研究将开发一种新的技术，称为直接接触式液体串热交换器（DILSHE），用于蒸汽发电厂的干式冷却。 DILSHE的一个主要特点是使用廉价和轻质材料，使其非常经济，易于运输。 使用流过密集阵列的平行串的非挥发性液体的薄膜来实现高传热效率，同时减少相关的气流压降。 DILSHE的另一个特点是其模块化设计，这使得多个单元可以堆叠在一起形成大型冷却单元，每个模块都可以现场维修和/或更换。本研究建议进行系统的实验和理论研究，为DILSHE的严格设计和优化奠定科学和工程基础。 它将改进和应用先进的流体机械和热计量工具和技术，用于研究重力驱动的薄液膜流动的不稳定性以及质量、动量和能量传输的相关增强。 还将对非挥发性传热液体进行全面调查和初步筛选，以促进探索其不仅在拟议的DILSHE中而且在其他传热应用中的新用途。 该研究还将建立和测试一个实验室规模的原型（25千瓦的容量），以验证拟议的设计，并促进该技术的进一步商业化发展。该项目还将包括专门的努力，让来自代表性不足群体的本科生和研究生参与进来。K-12 STEM教育将通过为高中生开发创新项目来促进，该项目基于从摇篮到职业生涯的理念，利用该项目的研究组成部分与加州大学洛杉矶分校的外联办公室协调。 该项目还将包括努力促进工程商业机会，如果及早灌输，将有助于促进与美国青年产生共鸣的创业精神。