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Cascading and radiator flow optimization in district heating substations and advanced customer accounting - In pursuit of improved cooling

Lauenburg, Patrick LU and Wollerstrand, Janusz LU (2005) 18th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2005) In Proceedings of Ecos 2005, Vols 1-3 - Shaping our future energy systems p.1035-1042
Abstract
Ibis paper deals with various methods of improved cooling of primary water in district heating (DH) substations and evaluates the benefit of an improved cooling from the perspective of the construction of an appropriate customer accounting method. The general benefit of an improved cooling is well-known: Less thermal stresses in pipelines, lowered heat and pumping losses and increased capacity in the network, improved efficiency of combined heat and power plants and other types of generating plants using heat pumps, waste heat and flue gas condensation. To stimulate improved cooling in customer owned DH substations, some Swedish DH companies apply a method of customer accounting based not only on heat energy consumption but also on primary... (More)
Ibis paper deals with various methods of improved cooling of primary water in district heating (DH) substations and evaluates the benefit of an improved cooling from the perspective of the construction of an appropriate customer accounting method. The general benefit of an improved cooling is well-known: Less thermal stresses in pipelines, lowered heat and pumping losses and increased capacity in the network, improved efficiency of combined heat and power plants and other types of generating plants using heat pumps, waste heat and flue gas condensation. To stimulate improved cooling in customer owned DH substations, some Swedish DH companies apply a method of customer accounting based not only on heat energy consumption but also on primary water usage and mean water cooling. This benefits customers with thermodynamically well-functioning substations, i.e. a proper cooling, at the expense of customers with less well-functioning substations. The extension of 'flow accounting' has been mapped and found to be applied for a majority of the delivered heat. It represents an important incentive for proper cooling in substations. The study has found that the size of the flow accounting generally very well reflects the benefits for the DH company from an improved cooling. The amount of cooling of DH primary water achieved in DH substations depends on the employed connecting scheme. In a recent study, we demonstrated that adopting three-stage cascading could achieve significant improvements in this respect. The economical aspects on this subject are here further mapped out based on the results from the study of flow accounting. Optimized and properly functioning substation and secondary systems are, from an economical perspective, of at least equal interest as the choice of connection scheme. Especially if there is an existing oversizing of the radiators, considerably larger savings can be made if optimized control of the radiator circuit is employed. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
customer accounting, cascading, district heating, substations, circuit, radiator
in
Proceedings of Ecos 2005, Vols 1-3 - Shaping our future energy systems
pages
1035 - 1042
publisher
Norwegian University of Science and Technology
conference name
18th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2005)
external identifiers
  • WOS:000232156000127
  • Scopus:84924352115
ISBN
82-519-2041-8
language
English
LU publication?
yes
id
0a3e1da5-bd46-4038-ae87-76810598a724 (old id 1406448)
date added to LUP
2009-06-05 09:44:28
date last changed
2017-01-01 08:02:29
@inproceedings{0a3e1da5-bd46-4038-ae87-76810598a724,
  abstract     = {Ibis paper deals with various methods of improved cooling of primary water in district heating (DH) substations and evaluates the benefit of an improved cooling from the perspective of the construction of an appropriate customer accounting method. The general benefit of an improved cooling is well-known: Less thermal stresses in pipelines, lowered heat and pumping losses and increased capacity in the network, improved efficiency of combined heat and power plants and other types of generating plants using heat pumps, waste heat and flue gas condensation. To stimulate improved cooling in customer owned DH substations, some Swedish DH companies apply a method of customer accounting based not only on heat energy consumption but also on primary water usage and mean water cooling. This benefits customers with thermodynamically well-functioning substations, i.e. a proper cooling, at the expense of customers with less well-functioning substations. The extension of 'flow accounting' has been mapped and found to be applied for a majority of the delivered heat. It represents an important incentive for proper cooling in substations. The study has found that the size of the flow accounting generally very well reflects the benefits for the DH company from an improved cooling. The amount of cooling of DH primary water achieved in DH substations depends on the employed connecting scheme. In a recent study, we demonstrated that adopting three-stage cascading could achieve significant improvements in this respect. The economical aspects on this subject are here further mapped out based on the results from the study of flow accounting. Optimized and properly functioning substation and secondary systems are, from an economical perspective, of at least equal interest as the choice of connection scheme. Especially if there is an existing oversizing of the radiators, considerably larger savings can be made if optimized control of the radiator circuit is employed.},
  author       = {Lauenburg, Patrick and Wollerstrand, Janusz},
  booktitle    = {Proceedings of Ecos 2005, Vols 1-3 - Shaping our future energy systems},
  isbn         = {82-519-2041-8},
  keyword      = {customer accounting,cascading,district heating,substations,circuit,radiator},
  language     = {eng},
  pages        = {1035--1042},
  publisher    = {Norwegian University of Science and Technology},
  title        = {Cascading and radiator flow optimization in district heating substations and advanced customer accounting - In pursuit of improved cooling},
  year         = {2005},
}