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Plenary Lecture
Simulation of Consumption in District
Heating Systems
Professor Daniela Popescu
Professor of Power Engineering,
Technical University “Gheorghe Asachi” Iasi, Romania
ROMANIA
Tel: +0040332108656,
Email: daniela_popescu@tuiasi.ro
Abstract: The district heating companies from Europe had an annual
turnover (2005) of 19.5 billion Euro and supplies heat to more than 100
million people. District heating contributes to higher energy efficiency,
greater security of supply and lower carbon dioxide emissions. There is a
need to strengthen the competitiveness of this technology.
Important differences between Eastern and Western DHS exist not only
regarding the level of modern equipment, but also in the conception of
design and operating.
In most Western European countries, the entire district heating system is
demand driven, using control equipment at four independent levels: two at
the customer and two managed by the district heating operator. Each building
usually has separately regulated systems for supplying heat to the radiators
(space heating), to the domestic hot water system and to the ventilation
system. The main advantage of this concept is that customers establish the
space heat demands by means of thermostatic valves, at the first level of
the heat demand control, without the risk that the District Heating Company
delivers more or less heat than necessary.
In most Eastern European countries, the mentality is different: the District
Heating Company evaluates the quantity of heat for each building and
delivers it through a distribution network to substations. A number of 20-30
buildings, usually blocks of flats, are connected to the substation and must
share the quantity of heat delivered. Only few consumers can adjust the
quantity of consumed heat, using thermostatic valves, and the others are
forced to receive the rest.
One major area of energy savings and the resulting financial expenditure is
the ability to predict the heat consumption in order to match the energy
supply. Some methods for simulation and prognosis with a special approach
for production driven systems are presented in this study. The influence of
input parameters proposed to be taking into consideration for the simulation
of heat demand of buildings connected to a district heating system is
analyzed. The differences between software for prognosis of heat demand
appropriate for production driven systems and software appropriate for
demand driven systems are pointed out.
Brief Biography of the Speaker:
Daniela Popescu is Professor at Fluid Mechanics, Fluid Machines and Drives
Department, Technical University “Gheorghe Asachi“ Iaşi, Romania. She has 18
years of teaching experience in Fluid Mechanics, Fluid Machines, District
Heating Systems, Pipeline Systems, Hydroelectric Plants.
Her research interests include district heating systems, fluid mechanics,
hydraulic installations, pipeline networks, aerodynamics and hydrodynamics
of turbomachines, experimental technologies for research in hydraulic
machines area, design and optimisation of ventilators, hydraulic power
plants. She is the manager of the Romanian team in an European research
contract and the coordinator of two national complex multidisciplinary
research projects.
She published 5 books as author and more than 75 papers as main author or
co-author.
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