Conveners
C3Po1E - Air and Carbon Dioxide Systems
- Srinivas Vanapalli (University of Twente)
- John Pfotenhauer (Adviser, second author)
Pre-cooling of helium with liquid nitrogen is a good alternative for large scale helium refrigerators for initial cool-down from room temperature to about 80 K due to higher exergy efficiency, higher cooling capacity, and lower demand of heat exchanger area. However, during the initial coo-down, two problems have to be faced for improper liquid nitrogen pre-cooling stage arrangement....
Thermodynamic performance analysis and comparison of two types of miniature liquid nitrogen generators are conducted in this paper. Feed nitrogen (or air) is cooled and liquefied by a propane precooled mixed-refrigerant Joule–Thomson (MRJT) refrigeration cycle, or a feed gas expansion process (precooled Kapitza cycle), respectively. Pure nitrogen supplement and mini air separation columns are...
Due to the nature of fluctuation and intermittency, the increasing penetration of wind and solar power will bring a huge impact to the power grid management. Therefore the concept of liquid air energy storage system was proposed. Compared to compressed air energy storage, liquid air energy storage has a larger storage capacity and no geographic constraints owing to the high density of liquid...
In order to overcome the disadvantages of uncertainty, randomness and intermittency brought by wind and solar energy, different energy storage systems were put forwarded. Liquid air energy storage is an important technology in solving the grid connection problem of large-scale renewable energy. However, the production of liquid air needs a cryogenic liquefaction technology below a temperature...
Liquid air energy storage (LAES) represents a promising solution due to its relatively large volumetric energy density and ease of grid load shifting. In the LAES system, efficiency of heat exchange in each subsystem has an intensely crucial impact on overall system performance, including the selection of heat exchange mode and medium, the setting of minimum heat transfer temperature...
Cryogenic air separation is by present the most economical approach to gain high-purity products in a large scale. Structured packing columns (SPC) are widely focused and applied due to their characteristics of high efficiency and energy saving in the cryogenic distillation process. The main aims of the design of SPC are to reduce energy consumption and initial investment, while its optimal...
