Papers by Venkatesan Narayanaswamy
Cooperative Research Centre (CRC) for Sustainable Resource Processing, , 2005
Low-grade heat is heat energy at a relatively low temperature (typically below 250C) so that it c... more Low-grade heat is heat energy at a relatively low temperature (typically below 250C) so that it cannot be recovered and put into profitable use by conventional heat recovery technologies. Low-grade heat is however one of the largest energy losses from many industrial processes, while it is also a source of water loss (evaporation from cooling towers etc). This has sparked renewed interest in low-grade heat recovery opportunities.
This report captures the current status of knowledge on low-grade heat recovery and use, within the context of potential application of such in the minerals processing sector. Concepts governing the feasibility of low-grade heat recovery are briefly discussed, as well as core elements of typical low-grade heat recovery systems and systematic processes for their design and implementation. The central part of the report provides a comprehensive coverage of various low-grade heat recovery and use applications in various industries worldwide. The technologies that underpin each application have been described and broadly categorised in terms of their potential readiness (off-the-shelf availability) and applicability for minerals processing:
• Proven (short-term) applications such as industrial heat pumps, heat pipes, heat transformers, enhanced heat exchangers, Dual Function Absorption Cycle, Organic Rankine Cycles (ORCs) and their integration with Phase Change Materials (PCMs)
• Medium-term applications such as geothermal and Kalina cycle, adsorption refrigeration, and printed circuit heat exchanger; and
• Long-term applications such as heat storage and transmission using PCMs and heat pumps, thermophotovoltaics, and thermo- and pyro-electrics.
Given their comparatively mature development, it deserves recommendation to assess where and how the ‘proven’ technologies can be applied most profitably in minerals processing, while keeping a watching brief on progress in overcoming current technology limitations in the technologies currently rated as medium- and long-term applications.
The review confirmed that recovery and use of low-grade heat is doable, with a number of technologies being applied across a range of industry sectors. However, on the basis of public-accessible information there appears to be a lack of application of low-grade heat recovery in minerals processing industry, despite the fact that the industry is well-known for its low-grade heat emissions. It is therefore proposed to launch an integrated research and technology development program into the application of low-grade heat recovery in the (Australian) minerals processing industry. At its core, such program would involve several technology demonstrations or pilot projects, which each would demonstrate a particular low-grade heat recovery technology at a typical minerals processing site, employing the standard project implementation process (i.e. project definition; concept study; detailed design; and construction and commissioning). This would be complemented with the development and pilot test of supportive information, assessment and design tools, including: inventory of low-grade heat sources and potential uses; database of low-grade heat recovery and use technologies; flowsheets for low-grade heat recovery for typical minerals processing operations; and assessment and design tools for evaluation of low grade heat recovery systems.
A comprehensive review of major incidents and regulatory reform needed in India to drastically re... more A comprehensive review of major incidents and regulatory reform needed in India to drastically reduce fatalities in major industrial accidents
The Loss Prevention Bulletin, Feb 1, 2015
Livemint Newspaper, Jun 23, 2014
Journal of Cleaner Production, Jan 1, 2007
Journal of Cleaner Production, Jan 1, 2001
Proc. Aust. Conf. on …, Jan 1, 2005
Technical Documents by Venkatesan Narayanaswamy
Uploads
Papers by Venkatesan Narayanaswamy
This report captures the current status of knowledge on low-grade heat recovery and use, within the context of potential application of such in the minerals processing sector. Concepts governing the feasibility of low-grade heat recovery are briefly discussed, as well as core elements of typical low-grade heat recovery systems and systematic processes for their design and implementation. The central part of the report provides a comprehensive coverage of various low-grade heat recovery and use applications in various industries worldwide. The technologies that underpin each application have been described and broadly categorised in terms of their potential readiness (off-the-shelf availability) and applicability for minerals processing:
• Proven (short-term) applications such as industrial heat pumps, heat pipes, heat transformers, enhanced heat exchangers, Dual Function Absorption Cycle, Organic Rankine Cycles (ORCs) and their integration with Phase Change Materials (PCMs)
• Medium-term applications such as geothermal and Kalina cycle, adsorption refrigeration, and printed circuit heat exchanger; and
• Long-term applications such as heat storage and transmission using PCMs and heat pumps, thermophotovoltaics, and thermo- and pyro-electrics.
Given their comparatively mature development, it deserves recommendation to assess where and how the ‘proven’ technologies can be applied most profitably in minerals processing, while keeping a watching brief on progress in overcoming current technology limitations in the technologies currently rated as medium- and long-term applications.
The review confirmed that recovery and use of low-grade heat is doable, with a number of technologies being applied across a range of industry sectors. However, on the basis of public-accessible information there appears to be a lack of application of low-grade heat recovery in minerals processing industry, despite the fact that the industry is well-known for its low-grade heat emissions. It is therefore proposed to launch an integrated research and technology development program into the application of low-grade heat recovery in the (Australian) minerals processing industry. At its core, such program would involve several technology demonstrations or pilot projects, which each would demonstrate a particular low-grade heat recovery technology at a typical minerals processing site, employing the standard project implementation process (i.e. project definition; concept study; detailed design; and construction and commissioning). This would be complemented with the development and pilot test of supportive information, assessment and design tools, including: inventory of low-grade heat sources and potential uses; database of low-grade heat recovery and use technologies; flowsheets for low-grade heat recovery for typical minerals processing operations; and assessment and design tools for evaluation of low grade heat recovery systems.
Technical Documents by Venkatesan Narayanaswamy
This report captures the current status of knowledge on low-grade heat recovery and use, within the context of potential application of such in the minerals processing sector. Concepts governing the feasibility of low-grade heat recovery are briefly discussed, as well as core elements of typical low-grade heat recovery systems and systematic processes for their design and implementation. The central part of the report provides a comprehensive coverage of various low-grade heat recovery and use applications in various industries worldwide. The technologies that underpin each application have been described and broadly categorised in terms of their potential readiness (off-the-shelf availability) and applicability for minerals processing:
• Proven (short-term) applications such as industrial heat pumps, heat pipes, heat transformers, enhanced heat exchangers, Dual Function Absorption Cycle, Organic Rankine Cycles (ORCs) and their integration with Phase Change Materials (PCMs)
• Medium-term applications such as geothermal and Kalina cycle, adsorption refrigeration, and printed circuit heat exchanger; and
• Long-term applications such as heat storage and transmission using PCMs and heat pumps, thermophotovoltaics, and thermo- and pyro-electrics.
Given their comparatively mature development, it deserves recommendation to assess where and how the ‘proven’ technologies can be applied most profitably in minerals processing, while keeping a watching brief on progress in overcoming current technology limitations in the technologies currently rated as medium- and long-term applications.
The review confirmed that recovery and use of low-grade heat is doable, with a number of technologies being applied across a range of industry sectors. However, on the basis of public-accessible information there appears to be a lack of application of low-grade heat recovery in minerals processing industry, despite the fact that the industry is well-known for its low-grade heat emissions. It is therefore proposed to launch an integrated research and technology development program into the application of low-grade heat recovery in the (Australian) minerals processing industry. At its core, such program would involve several technology demonstrations or pilot projects, which each would demonstrate a particular low-grade heat recovery technology at a typical minerals processing site, employing the standard project implementation process (i.e. project definition; concept study; detailed design; and construction and commissioning). This would be complemented with the development and pilot test of supportive information, assessment and design tools, including: inventory of low-grade heat sources and potential uses; database of low-grade heat recovery and use technologies; flowsheets for low-grade heat recovery for typical minerals processing operations; and assessment and design tools for evaluation of low grade heat recovery systems.