Rīgas Tehniskā universitāteEnerģētikas un elektrotehnikas fakultāte

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SMALL SCALE DH SYSTEMS. DEMAND SIDE MANAGEMENT EFFECT

Marika Rosa, Francesco Romagnoli,Dagnija Blumberga,

Girts Vigants

Institute of Energy Systems and Environment,

Riga Technical University

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Several aspects of DH optimization and maintaining

specific economical situation of the country, share of the exploitable heating sources, conditions of the distribution systems, the price of the fuels, other important factors related to society habits

and behaviours and investor financial capabilities.

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Heating sources. Existing situation in small municipalities Small DH system

Boiler houses Individual heat energy sources for multifamily

anf municipal building Boilers Heat pumps

Individual solutions in appartments Boilers Electrical heating

DH boiler house. Case study

Parameters 2010 2011Installed capacity, MW 1 1Wood chips consumption, m3/year 3793 3000Sawdust consumptions, m3/year 200Wood fuel energy, MWh/year 2503 2112

Heat energy production, MWh/year 1509 1297

Calculated efficiency, % 60 61

Heat energy tariff, LVL/MWh 31 32

Solutions for heating. Case studies

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Energy savings. Case study

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Energy consumption forecast

0

50

100

150

200

250

Īpat

nēja

is sil

tum

ener

ģija

s pa

tēriņ

š, kW

h/m

2ga

dā 2010 2011

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Demand side management scheme in small municipality

Municipality

Energy administrative department

Residential buildings Municipal

buildings

Biomass terminal

contract

financing

,

contract

financing

Boiler house

financing

financing

contract

Subsidies, social benefits

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Conclusions

Demand side management effect to reduction of consumption of energy resources. It creates decrease of DH system energy efficiency.

Due the variety of situations related to the renovation and redesigning of the DH supply system different ad-hoc strategic solution and schemes have to be adopted for each municipality.