Solar Powered Cascading Cogeneration Cycle with ORC and Adsorption Technology for Electricity and Refrigeration
As a renewable source, solar energy has received more and more attention in recent years. Solar energy can easily provide the heat source for household hot water with a temperature of 70-100 oC with reasonable efficiency. In recent years the successful development of small silica-gel adsorption refrigerators has enabled them to be driven from low temperature heat sources. Combined with a silica-gel adsorption refrigeration cycle for the recovery of solar energy, a cascading cycle is designed and discussed in this paper, in which an Organic Rankine Cycle (ORC) and an adsorption refrigeration cycle are utilized as the first and the second stage energy conversion cycle, respectively. In this study, R600 fluid was analyzed for the ORC, and the RD silica gel-water working pair was analyzed for adsorption cycle under the condition of environmental temperature of 30 oC, refrigeration temperature of 12oC, and heating temperature of 78-97 oC. The energy efficiency for electrical generation and refrigeration is analyzed, as well as the exergy of the cascading cycle is calculated. The results show that 1kW electricity and 6.3 kW refrigeration can be gotten under the condition of about 15kW heating power. The electricity generation efficiency is 0.1-0.15, while the refrigeration coefficient of performance is approximately 0.8. The exergy efficiency was found to be 0.84-0.89 and 0.32-0.46 for single ORC and single adsorption cycle, respectively. The total exergy efficiency is 0.56-0.74, which is improved by 10％-40％ if compared with the Goswami cycle for the cogeneration of electricity and refrigeration.
Solar energy cogeneration ORC adsorption refrigeration electricity
L.W. Wang A.P. Roskilly R.Z. Wang
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China Ce Centre for Energy Research, Newcastle University, Newcastle NE1 7RU, UK Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-5
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）