Abstract
Energy saving potentials related to steam generation and its usage in the medium size bakery are analyzed and presented. Input data needed for the investigation are gathered through detailed energy audit. Four energy savings measures are analysed in detail: 1) change of heat generator for space heating and domestic hot water preparation from steam boiler to condensing boiler, 2) reduction of heat losses from steam and condensate distribution lines, 3) heat utilization of return condensate and 4) replacement of the old, low efficiency steam boiler with high-efficient one. Implementation of these measures will result in substantial reduction of energy costs, ranging from 2.900 to 26.200 € annually. Interaction of all measures is analysed through energy efficiency improvement scenario, whose implementation will ensure significant energy cost savings, estimated at 40.793 € annually, with simple payback period shorter than 4 years. Implementation of presented measures will improve facility’s energy efficiency, represented through reduction of annual energy performance indicators by 6,14 %. Presented analysis revealed that steam generation and its usage in the industrial facilities offer a substantial potential for reduction of energy use and energy related cost.
Highlights
Increase of energy efficiency in Bosnia and Herzegovina (B&H) has become a topic of great importance in the previous period
Results of detail analysis of energy savings gathered through energy audit are presented
Analysis has revealed that there is a large potential for energy and energy cost savings, in the steam generation and steam use sector
Summary
Increase of energy efficiency in Bosnia and Herzegovina (B&H) has become a topic of great importance in the previous period. The proper sizing of condensing boiler is ensured, so it is shown that needed nominal power of condensing boiler is 100 kW smaller than presented in [12] which results in smaller investment and operational costs This approach combines result of energy need calculation of nonresidential building and energy saving measures of industrial system. These values are used for calculation of delivered energy and natural gas consumption both for the current state of facility and for the state after implementation of energy saving measure, as described in following sections. Installation of Condensing Boiler for Heating and DHW System of Administrative Building Based on the calculated data of energy needs for heating and DHW system and values of overall system efficiency, delivered energy needed is calculated, with corresponding annual natural gas consumption and annual costs. Energy needs for heating and DHW system, kWh/year System efficiency, % Delivered energy for heating and DHW system, kWh/year Natural gas consumption, m3/year Natural gas costs, €/year Nominal power of condensing boiler, kW
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