@ARTICLE{Krawczyk_Piotr_Cumulative_2013, author={Krawczyk, Piotr}, number={No 4 December}, journal={Archives of Thermodynamics}, pages={23-34}, howpublished={online}, year={2013}, publisher={The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences}, abstract={Controlling low-temperature drying facilities which utilise nonprepared air is quite difficult, due to very large variability of ventilation air parameters - both in daily and seasonal cycles. The paper defines the concept of cumulative drying potential of ventilation air and presents experimental evidence that there is a relation between this parameter and condition of the dried matter (sewage sludge). Knowledge on current dry mass content in the dried matter (sewage sludge) provides new possibilities for controlling such systems. Experimental data analysed in the paper was collected in early 2012 during operation of a test solar drying facility in a sewage treatment plant in Błonie near Warsaw, Poland.}, type={Artykuły / Articles}, title={Cumulative ventilation air drying potential as an indication of dry mass content in wastewater sludge in a thin-layer solar drying facility}, URL={http://journals.pan.pl/Content/94458/PDF/02_paper.pdf}, doi={10.2478/aoter-2013-0027}, keywords={Sewage sludge drying, Solar drying, Dry matter calculation}, }