Open AccessPerformance Analysis of a New Waste Heat Recovery System
Publication year - 2015
Publication title -
international journal of thermal and environmental engineering
Language(s) - English
Resource type - Journals
ISSN - 1923-7316
DOI - 10.5383/ijtee.12.01.006
Subject(s) - waste heat , heat flux , waste heat recovery unit , heat pipe , heat recovery ventilation , energy recovery , waste management , heat energy , materials science , nuclear engineering , heat sink , hybrid heat , environmental science , thermodynamics , mechanical engineering , energy (signal processing) , heat transfer , engineering , heat exchanger , physics , quantum mechanics
The overall theme of this research is to capture, concentrate and convert some of the waste heat generated at industrial plants to a valuable form of energy. A new system for heat recovery from low grade energy has been built and tested based on a modified heat pipe technology. A single heat pipe used in this research was able to extract 2 kW of energy from waste heat of 250 oC. However a heat pipe can extract 11.5 kW/m2 heat fluxes. The maximum energy extraction by such system from low grad energy can be up to 3 kW. While a heat pipe regardless of its size can have heat flux up to 16.5 kW/m2 from waste heat flow at 250 oC and 12.3 m/s velocity. Also, the system can extract about 1 kW heat or 6.5 kW/m2 heat flux at temperatures as low as 150 oC. However, the system doesn’t function properly at temperatures lower than 150 oC.