登录
 机构网站
  1. 首页
  2. 情报产品
  3. 快讯详情

《Exergy analysis of an adiabatic compressed air energy storage system using a cascade of phase change materials》

  • 来源专题：广州能源研究所信息监测
  • 编译者： giecinfo
  • 发布时间：2016-04-14

  • Adiabatic compressed air energy storage is an emerging energy storage technology with excellent power and storage capacities. Currently, efficiencies are approximately 70%, in part due to the issue of heat loss during the compression stage. An exergy analysis is presented on a novel adiabatic compressed air energy storage system design utilizing a cascade of PCMs (phase change materials) for waste heat storage and recovery. The melting temperatures and enthalpies of the PCMs were optimized for this system and were shown to be dependent on the number of PCMs, the number of compression stages, and the maximum compression ratio. Efficiencies of storage and recovery using this approach are predicted to be as high as 85%, a 15% increase over current designs which do not incorporate PCMs.

95浏览量
原文链接
相关报告

  • 《Experimental study of compressed air energy storage system with thermal energy storage》
    • 来源专题：广州能源研究所信息监测
    • 编译者：giecinfo
    • 发布时间：2016-03-24
    • In this paper, the first public experiment on the CAES (compressed air energy storage) system with TES (thermal energy storage) is presented. A pilot plant using water as thermal energy storage working medium was constructed to investigate the performance of the CAES system with TES. An average round trip energy efficiency of 22.6% was achieved. Detailed analysis for a particular test was performed to study the major factors affecting the system. During the charge process, the consumed compressor electric energy was 1375 kWh with the air pressure inside the storage tank increasing from 3.36 MPa to 9.34 MPa. The total amount of heat absorbed was 565 kWh, while the storage water temperature reached 108.6 °C in the TES system. During the discharge process, the maximum generator power of 430 kW was obtained. The output electric energy was 326 kWh with the air pressure inside the storage tank decreasing from 8.65 MPa to 3.05 MPa. Also, the variation of air temperature along with the air pressure inside the storage tank was discussed during both the charge and discharge process. In this research, efforts are being made to validate the theories in the open literature and extend further practical applications of the CAES system with TES.
    112浏览量
    原文链接

  • 《Optimization-based planning of a biomass to hydrogen (B2H2) system using dedicated energy crops and waste biomass》
    • 来源专题：生物质生化转化信息监测
    • 编译者：giecinfo
    • 发布时间：2016-03-14
    • The utilization of biomass for hydrogen production is one of the promising options for a sustainable energy system. In this paper, we develop a new optimization-based approach for design and analysis of the B2H2 system including production, storage, and distribution using dedicated energy crops as well as various resources of waste biomass. To achieve this goal, we first develop an optimization model using mixed-integer linear programming technique that includes practical variables and constraints for decision-making about the usage of dedicated energy crops. We then conduct a case study of the B2H2 system for the road transportation sector of future Korea. As a result, we identify an optimal system configuration that includes the utilized biomass types, occupied land sizes, the number and location of facilities, and the biomass and hydrogen flows between regions. We also analyze the cost distributions and the sensitivity of the main cost drivers on the total annual cost (TAC). The results reveal that the proposed B2H2 system is economically competitive with some of the other renewable-based hydrogen supply systems (wind and solar) in Korea.
    132浏览量
    原文链接