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Knowing the level of energy efficiency is essential for substantiating investment decisions, operation and maintenance of energy consuming equipment and machines. Urban public transport is an important consumer of energy and, at the same time, an important source of pollution of the urban environment with greenhouse gases and micro particles. The present paper is aimed to identify the level of the energy performance of a public transport car fleet, having buses equipped with Diesel engines. The analysis methodology and the mathematical model used are applicable to other similar structures. The obtained results are valid for the analyzed car fleet, highlighting the values of the energy performance indicators, on the whole, by bus categories and for each bus from the park component. Based on the results obtained within the energy audit, comparisons are made for the level of energy performance with similar consumers, and feasible measures to improve energy efficiency are identified.

Knowing energy performance level of an energy consumer is essential for substantiating the decisions for development, operation and maintenance. Energy performance level is highlighted through consecrated indicators which are obtained by means of energy balance. The present paper is a synthesis of electric energy balance that was done within a mixed fodder factory (MFF). In the first part a short presentation of the consumer (MFF) is presented and also analysis methodology. After that we refer to specificities regarding the energy balance model (EB) applied and to characterization elements of typical processes for MFF. An important part of the paper is dedicated to present the obtained results and the energy performance level. In the last part of the paper we present the conclusion of energy audit (EA) and the recommendations to improve the energy performance level.

This article is structured in three parts. The first part is justifying the utility of developing PIEE, in the light of legal requirements, by companies that consume at least 1000 toe/year, but also in the light of the usefulness of PIEE in increasing both energy and economic efficiency of the organizations concerned. The second part contains a methodology of analysis and a synthesis of the specifications on the energy consumption of the TC and energy performance indicator of these. Internal (between STC) and external (other TC) comparisons enable to identify the development potential of ENEF for the TC analyzed. The last part of the article represents the conclusions of the analysis.