Demonstration Project on Modernization of Heat Pumping Stations in Novodvinsk, Russia
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Demonstration Project on Modernization of Heat Pumping Stations in Novodvinsk, Russia Novodvinsk Municipality upgraded heat pumping stations in Novodvinsk which will reduce electricity consumption by 30 %. Brief Site Description. Novodvinsk is located on the left bank of the Northern Dvina River, 20 km from Arkhangelsk City. There are about 48 000 people living in the city. Long and severe winter time makes the heating season longer and implies higher requirements towards the heat networks in terms of heat supply reliability and efficiency. The city heat network is extensive and complex double-pipeline system with hot water supply directly from the heating networks. City’s heat supplier is CHP-1 of ОАО Arkhangelsk Pulp and Paper Mill. Heat is delivered from CHP-1 via four heating mains 300-500 mm in diameter, through which heating water is supplied to the booster pumping stations (HPS). Pumping stations are equipped with pumps boosting the pressure of heat agent up to the operating level (between 7.5 and 8 kgf/cm2). Pressure in the city Heat Pumping Station HPS 1 heating networks varies from 5,5 – 6 kgf/cm2 during the peak consumption and up to 9 kgf/cm2 during the nighttime. Boosting pumps were working under the same capacity irrespectively changes of the water demand supplied to the users, which was very inefficient. Besides, drastic pressure rise in the heating mains very often were causing leaks in the pipelines. In addition, to ensure heat supply for the city the HPS – 3 had to keep in operation 2 pumps 250 kW each at maximal capacity with half-opened dampers, which was increasing electricity consumption unreasonably. Project Objectives and Tasks. Due to the mentioned above, the Novodvinsk City Administration decided to upgrade the pumping stations HPS 1 and HPS 3 as much as possible. Installation of frequency controllers at pumping stations will allow to maintain constant heat water pressure in the heating mains. Replacement of one of the existing pumps at HPS 3 with the new 315 kW pump will allow stop using two pumps simultaneously, which will generate certain savings on electricity. Energy Audit. AOEEC carried out Energy Audit of Novodvinsk Heat Pumping Stations. The Energy Audit showed that modernization of the pumping stations will lead to: - reduction of electricity consumption by 20 – 60% - lower starting current - water saving by 5% - elimination of hydraulic impacts in the pipelines - minimize maintenance costs - longer equipment lifetime - reduce the accident risk - possibility of fine tuning of the system work. The stakeholders agreed to replace equipment and to install frequency controllers at HPS No.1 and No.3, which will generate considerable electricity savings and help to avoid hydraulic shocks and failures in supplying heating water to consumers. The project envisaged: - at HPS No.1: installation of frequency controllers, flow control units with electric drive, pressure sensors. - at HPS No.3: installation of flow control units with electric drive, frequency controller 315 kW, pressure sensors; replacement of the pump The project investments were 97 500 Euro with project pay back period less than 1 year. Financing. In 2000 Nordic Environment Finance Corporation (NEFCO) opened the Energy Saving Programme providing conditional grants for implementation of energy saving projects in municipalities of Northwest Russia. Business Plan for this project was submitted to NEFCO and the City Administration was awarded with 39 000 Euro conditional grant covering 40 % of the total investments. The condition of grant was to repay the project investments to the established Municipal Revolving Fund for energy efficiency projects. The rest of the investments were covered by the City Administration. Implementation. The projects implementation was commenced during the spring 2005. The tender for the equipment supply and installation works was carried out in April 2005. During the tendering the Technical Requirements had to be modified because the Business Plan was developed during 2003-2004, when the parameters of heating water supplied by Arkhangelsk Pulp and Paper Mill were considerably lower compared to standards, which implied keeping in operation three heat pumping stations. Then the parameters for heat supply have been changed and the main load was applied on HPS No.3 and partially on HPS No.1. The equipment installed within the project was produced by Schneider Electric, Merlin Gerin and leading pump New pump installed at HPS 3 producers of Russia. The project was completed in December 2005. Monitoring and Results. As the project was completed just in December 2005, nowadays AOEEC is preparing energy monitoring report where actual annual savings will be determined. Conclusions and Lesson Learned. This demonstration project shows that it is very beneficial for municipalities to combine energy efficiency with measures targeted on re-equipment of different municipal utilities. It ensures not only improvement of the process equipment, but also more efficient use of energy. Increasing energy and water tariffs make energy efficiency investments more and more profitable. Hence, implementation of energy efficiency measures should be prioritised for the utility owners. For more information on this project and to find out how Energy Efficiency can help you please contact Alexander Chulkov: Arkhangelsk Oblast Energy Efficiency Centre 4 Lenin sq., office 1102, Arkhangelsk, Russia Phone:+7 8182 65 21 36, Fax:+7 8182 65 71 42; E-mail: [email protected] , Internet:www.aoeec.com .