ENERGY EFFICIENCY MEASURES
Delta Holding regularly analyses possibilities for the improvement of energy efficiency with the aim of reducing operative costs and the emission of gases. At the same time, the Company strives to optimize the costs of energy consumption and contribute to the goals of sustainable development with regard to reduction of negative impact of the operation on weather and environment.
In 2020, the gas boiler in Yuhor factory was replaced with a new energy efficient boiler which uses less natural gas to provide more heating energy. The level of exploitation of the new boiler is 95%, whereas the old one the maximum level of consumption was 80%. Consumption of energy will reduce by approximately 20%.
Within the energy plant Delta Power Plant, in addition to three large gas boilers of 3.7 MW, two smaller condensing boilers were installed. In the transition periods and warm months, large boilers are not put to minimum operation, which significantly reduces their efficiency, but the energy is obtained from small condensing boilers. It will reduce the consumption of energy by 10 to 15%.
The new distribution centre for fruit in Nova Pazova implements the latest technologies with regard to machinery and electric equipment, which use less energy for the same production processes in comparison with standard technologies. This particularly refers to the systems for ventilation and cooling of chambers for fruit in which the consumption of compressed air is controlled and optimized. The chambers are made of insulation materials, whereas the engines of the air circulation system have frequency control, which reduces energy consumption. The most demanding system, i.e. banana ripening chamber, is equipped with the latest ventilation systems which save 20% of energy in comparison with standard solutions. The facility is completely furnished with LED lighting, which improves illumination and saves energy.
In the new Delta Planet shopping mall in Niš, thanks to the implementation of the latest building materials, the facility improved its energy efficiency and reduced the consumption of energy. Facade walls are made of Ytong blocks (which provide excellent thermal insulation) which in combination with rock wool save the energy necessary for heating/cooling of the facility. Structural facade and roof lantern made of glass provide a number of glass surfaces on the covering of the building, which do not disturb energy balance, and ensure B class energy efficiency. LED illumination consumes less energy and reflects less heat, which reduces the amount of energy needed for air-conditioning. The abovementioned elements also contribute to reduced energy consumption and CO2 emission.
In the seed production factory in Sombor, there is an ongoing project of expanding production capacities. The expansion requires additional amount of heating energy necessary for seed dryers. Since within the same production process, after obtaining corn seed, briar remains as one of the by-products, the Company decided to obtain heating energy for the new dryer from a biomass boiler that will use waste briar.
In 2020, the Company began the construction of an ULO cold store in Zaječar. New technological solutions and proper selection of equipment resulted in high level of energy efficiency and good ratio between starting investments and savings. Cooling stems from a central chiller with infinity mode compressors and advanced regulation which gives precise amount of cooling energy 25-100%. Every compressor is equipped with an economizer which increases the efficiency of device by 10% and consumes less energy. Cooling chambers for apples operate in the most optimal regime, with the aim of preserving the quality of fruits. At the same time, this reduces the consumption of energy by maintaining the set temperature. The installation of energy efficiency segments resulted in 30% less consumption of energy in comparison with standard solutions.
In 2020, in cooperation with an external consultant, the Company started conducting energy audits. In the first phase, 15 locations were selected. Based on the type of the facility, production process, and consumption of energy products, it was estimated that the energy efficiency could be improved through the introduction of renewable energy sources, which would additionally reduce CO2 emission.
An analysis was launched at 5 locations to investigate whether it is justified to install solar panels for the production of electric energy. The analysis was carried out in 3 food factories (Yuhor, Fun&Fit, Mioni), Apple Cold Store Čelarevo, and dairy farm Napredak in Stara Pazova. The energy produced by solar plants will be used for the needs of these facilities, which will reduce the consumption of electric energy by 20-30% from the distribution network. This will also reduce CO2 emission. Solar plants will be installed on the facility roofs only, and not on the ground, green and arable surfaces.
Investments in machinery, procurement of the latest models of tractors, preventive maintenance and introduction of new software solutions largely contributed to the reduction of fuel consumption and maintenance of machinery, as presented in the charts below.
Delta Holding’s new office building, Delta House, will be certified in accordance with LEED standard, as a LEED Gold facility. The building is equipped with ventilation systems whose parameters are by 30% better in comparison with the strictest standards. Lights are triggered by sensors, which optimize consumption of electricity. Taps are also equipped with sensors that optimize water consumption. The building will have a rain water collector, which will collect water to be used as technical water. Landscaping will include plant species which require less irrigation, to optimize water consumption. Every climatic chamber is furnished with a bipolar ionization, which maintain air quality at the highest level, free of viruses and bacteria. The building will be equipped with solar panels that optimize the consumption of electricity. Facility is structured as a light concrete structure filled with Unidom balls – balls made of recycled plastic, which also contributed to the reduction of CO2 emission in the course of construction (reduced concreting decrease CO2 emission). The building will have a parking area, dressing rooms and showers for cyclists, to motivate the employees to use alternative means of transport and reduce pollution.
Plans up to 2030 include:
- Installation of solar plants at 10 facilities and reduction of electricity consumption by 30%;
- Construction of a biogas plant in one of Delta Agrar farms, for the production of electric and heating energy and resolution of problem of biodegradable waste.