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Decentral ackumulering i ett stort fjärrvärmenät - Fallstudie vid Vestegnens Kraftvarmeselskab I/S, Köpenhamn

Thynell, Jakob and Zander, Martin (2008)
Department of Energy Sciences
Abstract
This master thesis was done in cooperation with the Danish district heating
company, Vestegnens Kraftvarmeselskab I/S. VEKS is a transmission
company supplying heat in western Copenhagen, Denmark.
VEKS wanted a global analysis over the possibilities to decrease the cost
and carbon dioxide emissions from purchased heat through decentralized
accumulation.
To cover all economical and environmental reasons for accumulation, four
posts were analyzed. The four posts included were: reducing the peak‐load,
optimization of base‐load, analyzing variation in heat load and existing
accumulators and finally simulations with optimization tools.
The conclusion was that it takes at least a 60 MWh accumulator with a
capacity of 15 MW to lower... (More)
This master thesis was done in cooperation with the Danish district heating
company, Vestegnens Kraftvarmeselskab I/S. VEKS is a transmission
company supplying heat in western Copenhagen, Denmark.
VEKS wanted a global analysis over the possibilities to decrease the cost
and carbon dioxide emissions from purchased heat through decentralized
accumulation.
To cover all economical and environmental reasons for accumulation, four
posts were analyzed. The four posts included were: reducing the peak‐load,
optimization of base‐load, analyzing variation in heat load and existing
accumulators and finally simulations with optimization tools.
The conclusion was that it takes at least a 60 MWh accumulator with a
capacity of 15 MW to lower the load factor in the north section of VEKS
transmission network. The storage volume has to be 1 150 cubic meters
with a height on 18.5 meters and a diameter of 8.9 meters.
It is not profitable for VEKS to invest in a decentralized accumulator. The
payback time is 12 years without taking the interest into account. If the
interest is taking into account, the investment never pays off. The total
reduced cost for purchased heat was estimated to 900 thousands Danish
kronor with 420 tonnes of reduced carbon dioxide emissions annually.
The local CHP‐plant Avedøre has an accumulator with a storage volume of
2 600 MWh. Instead of investing in a decentralized accumulator it would
be wise to use the existing Avedøre accumulators more effective.
We have not found any situations where there is need for further
accumulation capacity over 24 hours, thereby we do not exclude the
possibilities that they in fact exists. (Less)
Please use this url to cite or link to this publication:
author
Thynell, Jakob and Zander, Martin
supervisor
organization
year
type
H1 - Master's Degree (One Year)
subject
keywords
ackumulering, fjärrvärmenät
language
Swedish
id
1423676
date added to LUP
2009-06-23 10:39:48
date last changed
2009-06-23 10:39:48
@misc{1423676,
  abstract     = {This master thesis was done in cooperation with the Danish district heating
company, Vestegnens Kraftvarmeselskab I/S. VEKS is a transmission
company supplying heat in western Copenhagen, Denmark.
VEKS wanted a global analysis over the possibilities to decrease the cost
and carbon dioxide emissions from purchased heat through decentralized
accumulation.
To cover all economical and environmental reasons for accumulation, four
posts were analyzed. The four posts included were: reducing the peak‐load,
optimization of base‐load, analyzing variation in heat load and existing
accumulators and finally simulations with optimization tools.
The conclusion was that it takes at least a 60 MWh accumulator with a
capacity of 15 MW to lower the load factor in the north section of VEKS
transmission network. The storage volume has to be 1 150 cubic meters
with a height on 18.5 meters and a diameter of 8.9 meters.
It is not profitable for VEKS to invest in a decentralized accumulator. The
payback time is 12 years without taking the interest into account. If the
interest is taking into account, the investment never pays off. The total
reduced cost for purchased heat was estimated to 900 thousands Danish
kronor with 420 tonnes of reduced carbon dioxide emissions annually.
The local CHP‐plant Avedøre has an accumulator with a storage volume of
2 600 MWh. Instead of investing in a decentralized accumulator it would
be wise to use the existing Avedøre accumulators more effective.
We have not found any situations where there is need for further
accumulation capacity over 24 hours, thereby we do not exclude the
possibilities that they in fact exists.},
  author       = {Thynell, Jakob and Zander, Martin},
  keyword      = {ackumulering,fjärrvärmenät},
  language     = {swe},
  note         = {Student Paper},
  title        = {Decentral ackumulering i ett stort fjärrvärmenät - Fallstudie vid Vestegnens Kraftvarmeselskab I/S, Köpenhamn},
  year         = {2008},
}