SERBIAN CENTER FOR ENERGY EFFICIENCY

OFFERS SOLUTION HOW TO ACHIEVE SAVINGS THROUGH SPECIFIC PROJECTS THROUGH!

ENERGY EFFICIENCY IN INDUSTRY

Due to variety of industrial processes, it is not possible to describe ways in which everything can be made to improve energy efficiency. Common to many industries is that they generate steam and electricity for later use within the facilities. The heat generated as a by-product, in the context of electricity production, can be used to process steam, heat, or for other industrial purposes.

Energy efficiency in the industry can be achieved by producing energy using renewable energy sources. As forms of renewable energy may be solar panels on the roofs of industrial buildings, the use of heat pumps to achieve savings in terms of cheaper heating and wind turbines.

Saving energy in industry

It is essential that someone have motivation and that he can identify the benefits that implementation of certain energy efficiency measures can bring, in order to achieve energy savings in industry.

Saving energy is rational use of energy, to spend only as much as it is necessary, and that means to prevent unnecessary wastage and eliminate losses.

The industry is one of the largest energy consumers in our country, achieving a reduction in energy costs would lead us to increasing income, which is a very important reason for saving. The fact that, with good management of consuming energy in the industry, consumption of energy can be reduce nearly 20 to 30%, can be found in certain statistics!

Achieving positive results in energy savings in the industry is possible only by integrating important factors such as an expert knowledge of the field of industrial energy saving, thermodynamics, manufacturing, energy measurement, organizations labor, automation and regulation and energy tariffs.

IT IS NECESSARY TO SET THE FOLLOWING STEPS, IN ORDER TO ACHIEVE ENERGY SAVINGS:

Note the current situation with the necessary energy measurement
Analyze the current situation by processing available data
Calculate energy balances and budgets and finding places of energy losses and determine the potential for energy saving
Define measures to eliminate the obvious energy losses by priority and importance
Define improvement of industrial processes in order to better use of energy
Reconstruct bad installation or equipment and install new energy-efficient technologies

Saving energy and thus increase energy efficiency in the industry can be observed through observig energy consumption in steam systems, heat pumps as devices for energy saving and the useing of waste heat.

Steam plant

According to energy balance, loss of energy in steam systems can be greater than 30%.

There are many ways to improve energy efficiency and savings of steam in industrial plants.

FOR BEST RESULTS IN ENERGY-SAVING IN STEA SYSTEM IT IS REQUIRED TO:

Remove vapor losses from faulty steam traps
Use the optimum parameters of steam because unnecessary high vapor pressure consumes more power
Use heat condensate
Replace heating steam in premises, if they can be heated by hot water
Review of installations and preventive maintenance of steam installations, eliminate vapor losses at flanges, valves and steam traps, on regular base
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Parno postrojenje

Heat pumps as devices for saving of energy

The heat pump works in a circular process as cooling machines wherein working fluid passes stages of evaporation, compression damping and condensation. The degree of efficiency of heat pump is expressed by the ratio of the resulting heat to the energy consumption (COP). The heat pump can be used to heat domestic hot water, for use of waste heat for heating and cooling as well as heating and cooling buildings, workshops, plant.

Utilization of waste heat to save energy

WASTE HEAT CAN BE CLASSIFIED ACCORDING TO THE TEMPERATURE RANGES IN SEVERAL TYPES:

High temperature of 650°C
Medium temperature to 200 – 650°C
Temperature between 100 and 200°C
Lower temperatures than 100°C

High and medium temperature can produce process steam, electricity and for fueled combustion air. The largest amounts of wastewater in the industry have a temperature below 100°C, which includes condensate vapor, ventilation, cooling water and wastewater of industrial processes. The quality of the waste heat consists in its use value, not in its amount. The best case is if the waste heat can be used for the improvement of efficiency within the process, such as for example reheating combustion air in the boiler using flue gases.