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The results of monitoring of electricity consumption in farms participating in the project OZERISE

An active electricity consumption in the first quarter of 01.08 – 30.11.2013 by farms participating in the project OZERISE included in the range between 5 000 and 22 000 kWh, while consumption of energy on living in all households contained at a constant level between 1 400 and 4 600 kWh.

Varied energy consumption results from the various energy intensity and scale manufacturing processes occurring in individual farms (and in the case of domestic purposes – from the number of household members). The largest energy consumption was notice in orchard farm (about 20 000 kWh).

Figure 1 shows the variation in energy consumption depending on the farm participating in the project.

*LUC= Large unit conversion

Fig. 1. Electricity consumption on farms in the period 1.08 - 30.11.2013 broken down into energy used for household and industrial purposes

Individual groups of energy consumers, which can be either a single device (eg. grinder, feed mixer, drying) and a group of devices working in one place (eg. cowshed, piggeries, house) are characterized by diversified intensity of electricity consumption. Also in this case, energy consumption depend on production scale. The largest energy consumption was observed in the piggery (165 dairy and beef cattle). Also, high energy consumption was characterized by a dryer, located in farms with large acreage crops (143 and 370 ha). Other manufacturing processes are shown in Figure 2.

Fig. 2. Average active electricity consumption on the farm by major energy consumer in the period 01.08-30.11.2013

The following diagram shows the hourly active energy consumption for selected receivers of energy.

Fig. 3. Averaged active energy consumption profiles for selected receivers based on data from 01.08 to 30.11.2013.

There are two general reasons occurrence high variability in electricity consumption during the day. First one is the biological rhythm occurring at the farm (eg. milking dairy cattle in times of morning and afternoon or increased households activity in the mornings and evenings). The second reason is adjustment of working rhythm of the device to the electricity tariff structure (eg. grinder is active when a cheaper fare – in the afternoon).
In Figure 4 shows the seasonal electricity consumption for selected energy receivers.

Fig. 4. An active electrical energy consumption by selected receivers in the period 01.08 - 30.11.2013

Cold stores and dryers most intensively working in August and October, because in this month’s farmers must store fruits (orchard activities) and dry cereals after harvest. The seasonal variability in this case results from the nature of the producting processes.



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