Economic Modelling of CHP Potential in Energy Supply System of Latvia = Koģenerācijas potenciāla ekonomiskā modelēšana Latvijas energoapgādes sistēmā
2005
Darja Markova, Gatis Bažbauers, Antra Kundziņa

Latvian energy system has one of the highest penetration rate of district heating, and one of the lowest share of domestic electricity production among countries of EU. Therefore, use of CHP in district heating to decrease dependence on imported electricity and fuel as well as to minimise the environmental impact of heat and power supply is feasible solution that has to be promoted. The main target of the work was to continue investigation of potential heat loads of district heating available for CHP plants, selection of appropriate CHP technologies corresponding to the size of the district heating systems and available fuel, and creation of model where electricity prices from the studied CHP plants could be determined. Studies of CHP potential, based on actual fuel consumption in nearly all Latvian district heating systems with Winter maximum heat load exceeding 1 MW was done and the results are presented in this work. These results allowed to evaluate an amount of heat and electricity which could be potentially produced in Latvia by CHP plants, and corresponding saving of primary energy resources compared to separate heat and power production. Furthermore, the calculated savings of primary energy resources made it possible to estimate potential reduction of environmental impact when CHP production is compared with separate heat and power production. This reduction of environmental impact is expressed in tons of CO2, NOx and SOx eliminated by CHP, and corresponding monetary value of this reduction is found by looking at CO2 prices in emission trade market and estimates of externalities of these pollutants. With help of the model of economic calculations, investment needed to exploit the studied CHP potential is calculated, and prices of produced electricity by various CHP technologies are calculated. The calculation includes also fuel price forecast in order to compare prices of CHP electricity with forecast of general electricity price level during time period of up to 2020. The fuels that are considered to be used by analysed CHP systems are natural gas, wood and coal. Thus, the economic calculation model helps to find the optimum scenario for utilisation of CHP potential in Latvia during the considered time period with target condition that the weighted average electricity price from CHP plants is kept at minimum.


Atslēgas vārdi
Cogeneration, Electricity Price

Markova, D., Bažbauers, G., Kundziņa, A. Economic Modelling of CHP Potential in Energy Supply System of Latvia = Koģenerācijas potenciāla ekonomiskā modelēšana Latvijas energoapgādes sistēmā. Enerģētika un elektrotehnika. Nr.14, 2005, 204.-210.lpp. ISSN 1407-7345.

Publikācijas valoda
English (en)
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