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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | TieJun Zhang Wang, E.N. |
| Copyright Year | 2012 |
| Description | Author affiliation: Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, 02139, USA (Wang, E.N.) || Masdar Institute of Science and Technology, P. O. Box 54224, Abu Dhabi, UAE (TieJun Zhang) |
| Abstract | High-concentration photovoltaics (HCPV) is a highly promising technology to directly convert plentiful solar energy to electricity. However, even for the most advanced HCPVs, about 60% of the concentrated solar energy is rejected as waste heat; therefore, it is desirable to utilize the massive waste heat from HCPV modules. Considering the nature of low-grade waste thermal energy, a microscale organic Rankine cycle (MORC) offers a promising solution. In a subcritical MORC, subcooled refrigerant is usually pumped into a microchannel heat sink of each multi-junction photovoltaic cell. In this paper, a complete microchannel flow boiling model is developed based on distributed mass, energy and momentum conservation laws. Detailed MORC thermal-fluid analysis is conducted to evaluate the effects of working fluid, inlet subcooling, axial fluid/cell temperature distribution and critical heat flux on cogeneration efficiency. The performance analysis indicates that the HCPV/MORC system can achieve a net 8.8% increase of power generation efficiency in comparison to liquid-cooled HCPV at ambient temperature. The proposed HCPV/MORC configuration shows great promise in large-scale applications of HCPV solar power generation. |
| Starting Page | 993 |
| Ending Page | 1002 |
| File Size | 2903399 |
| Page Count | 10 |
| File Format | |
| ISBN | 9781424495337 |
| ISSN | 10879870 |
| e-ISBN | 9781424495320 |
| e-ISBN | 9781424495313 |
| DOI | 10.1109/ITHERM.2012.6231534 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-05-30 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Heating Waste heat Microchannel Fluids Abstracts Thermal expansion Investments waste heat utilization Concentrating photovoltaics microchannel cooling organic Rankine cycle thermal management |
| Content Type | Text |
| Resource Type | Article |
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