1. Rīgas Tehniskā universitāte Enerģētikas un elektrotehnikas fakultāte Vides aizsardzības un siltuma sistēmu institūts www.videszinatne.lv 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

2. 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. Vides aizsardzības un siltuma sistēmu institūts 2

3. 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 Vides aizsardzības un siltuma sistēmu institūts 3

4. DH boiler house. Case study Parameters20102011 Installed capacity, MW 11 Wood chips consumption, m 3 /year 37933000 Sawdust consumptions, m 3 /year 200 Wood fuel energy, MWh/year 25032112 Heat energy production, MWh/year15091297 Calculated efficiency, %6061 Heat energy tariff, LVL/MWh3132

5. Solutions for heating. Case studies

6. Energy savings. Case study Vides aizsardzības un siltuma sistēmu institūts 6

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8. Energy consumption forecast

9. Vides aizsardzības un siltuma sistēmu institūts 9 Demand side management scheme in small municipality

10. Vides aizsardzības un siltuma sistēmu institūts 10 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.