Igor Sutlović

Solar Energy System and Waste Heat Recovery in Industrial Process

Publisher Summary This chapter deals with the solar energy system and waste heat recovery in industrial process. The main aim of this chapter is to describe and evaluate the probability of energy savings at steam pressing process in garment industry. Process input data assembled through process observing are used to establish process efficiency and energy conservation. The possibility of fuel savings using flue gases heat recovery and solar energy as partial substitution for fuel oil can lead to significant energy conservation. Returning boiler flue gases, with satisfying temperature of 204°C to the economizer, to preheat boiler feed water, about 9% fuel can be saved. At same time exhaust temperature lowers from 204°C to 45.9°C. If solar energy use is planning the appropriate meteorological data for selected location (Croatia, Zagreb to = 45,049) should be known. The yearly fuel oil consumption for pressing process in garment industry which becomes 2.03 × 106 kg can be reduced by 50.9% by using solar collector field of 20.8 × 103 m2 and flue gases heat recovery.

Održivo gospodarenje otpadom s mehaničko biološkom obradom i energetskim iskorištavanjem

Professional paper A successful example of sustainable waste management applicable to towns or regions with more than two hundred thousand inhabitants is discussed. Modern landfill with composting facility, mechanical biological treatment and energy utilization of waste in the town of Celje, Slovenia, covering the needs of 24 surrounding municipalities, is described in details. The advantages, but also some difficulties that were indicated during the operation of the system are shown. Applied processing technology significantly reduces waste, extracts secondary raw materials and uses waste as an energy source, so achieving a sustainable system for a number of years. According to this successful example, our aim is to encourage similar projects in Croatia as well.

Fleksibilnost MBO postrojenja

Subject rewiew Mechanical Biological Treatment (MBT) of waste represents a series of mechanical and biological processes which have the purpose to reduce the amount of waste that is placed on a landfill. In accordance to the ‘hierarchy of waste’ defined by the EU Waste Framework Directive, waste disposal to landfill represents the least desirable option.Considering the MBT process, the input component is a Municipal Solid Waste (MSW) and output components consist of Refuse Derived Fuel (RDF), compost and possibly the materials suitable for recycling.The quality of output components depends on the input waste composition.More efficient primary waste separation decreases capacity and complexity of MBT facilities.RDF offers possibility of energy recovery from the part of such separated fractions.MBT technology does not solve the problem of harmful substances residual in MSW narrowing the application of compost obtained by the biological treatment and requiring additional treatment of flue gases from RDF combustion. Comparison of the composition of untreated MSW and RDF obtained by the MBT process is also presented in the paper.