Direct and indirect heat transfer in water network systems

This paper addresses direct/indirect heat recovery network design for water network systems. A particular water network case of two different temperature fresh water sources is analysed. A new systematic heat recovery design approach based on thermodynamics is proposed for water stream sets leading...

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Bibliographic Details
Published in:Applied thermal engineering 2002-06, Vol.22 (8), p.981-988
Main Authors: Savulescu, L.E., Sorin, M., Smith, R.
Format: Article
Language:English
Subjects:
Applied sciences
Building technical equipments
Buildings
Buildings. Public works
Direct and indirect heat transfer
Distribution. Storage
Energy management and energy conservation in building
Environmental engineering
Exact sciences and technology
Heat exchangers
Heat recovery
Thermal effects
Thermodynamics
Waste heat utilization
Water networks
Water supply. Pipings. Water treatment
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Summary:This paper addresses direct/indirect heat recovery network design for water network systems. A particular water network case of two different temperature fresh water sources is analysed. A new systematic heat recovery design approach based on thermodynamics is proposed for water stream sets leading to energy pinch problems. The concept of direct/indirect heat transfer decomposition is introduced to explore the design of heat exchanger network (indirect heat transfer) and non-isothermal mixing. This concept is illustrated through a new graphical segregation of the composite curves. To overcome the limitations associated with the representation of stream mixing in the composite curves, a new tool, source–demand energy composite curves, is introduced to evaluate the complexity of direct heat recovery and design different mixing scenarios.
ISSN:1359-4311
DOI:10.1016/S1359-4311(02)00015-7