The article presents the results of the analysis of parameters describing electricity consumption in individual phases of the production cycle on a poultry farm. One full broiler rearing cycle on the farm was analyzed. Electrical parameters were tested during the broiler rearing process using a power quality analyzer with a measurement interval of 1 min. During the tests, the analyzer recorded the active and reactive power, phase and line voltage, power factor, and frequency. On the basis of collected data, original indicators describing electricity consumption per chicken w_kA, w_kQ, and per unit area w_iA, w_iQ were determined. The regression curves of active and reactive power consumption in particular stages of the cycle were also determined, and the minimum and maximum values of active and reactive power consumption were determined. The accomplished research can be used in planning electricity demand in energy-self-sufficient areas. The presented original indicators can be used to determine power demand on broiler farms, depending on the planned production volume or size of farm buildings.

The main purpose of this paper is a systematic literature review on retrofitting tools, equipment, and infrastructure in the industrial domain. The methods used for the research were a systematic literature review: publication analysis, selection of databases, and appropriate modification of queries in individual databases. Findings were presented using a map of keywords, clusters, and charts. The main result of the conducted research was the identification of the main trends in the retrofitting area. The trends developed within the review can support further research into the direction of retrofitting methods and the factors determining the choice of specific techniques and tools in the digitalisation of manufacturing enterprises.

The article presents an extended methodology for calculating the LENI energy efficiency index for building lighting, taking into account an additional reactive power component—LENI_Q. The proposed methodology takes into account the influence of the power factor (cos φ), the nature of the receivers, and the presence of constant lighting intensity (CTE) systems. Based on the analysis of two public buildings (schools)—one without a photovoltaic installation and the other equipped with a PV system—it was shown that reactive power can be a significant component of the energy balance. For the facility without PV, a value of LENI_Q = 58.4 kvarh/m²·year was obtained, while for the facility with PV—4.75 kvarh/m²·year, which indicates a more than tenfold reduction in reactive energy thanks to the use of automation and renewable energy sources. A comparison with model values for different cos φ enabled an additional assessment of the efficiency of lighting installations. The aim of this study is to develop an extended methodology of the LENI indicator by introducing a reactive power component LENI_Q, enabling a comprehensive assessment of lighting energy efficiency.