Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Techno-economic analysis of the cogeneration process on board ships

Brozičević M., Martinović D., Kralj P.

Journal of Sustainable Development of Transport and Logistics

2017

Vol. 2, No. 1

6--15

Combined heat and power (CHP) is a facility which uses one energy source to produce both electricity and thermal energy at the same time. CHP has an advantage when compared to conventional power plants which produce only electricity or thermal energy because it is much more efficient - it minimizes the usage of its primary energy source, grid losses and greenhouse gas emissions. CHP’s big advantage lies in its applicability: it is highly compatible with existing technologies already in use in different power systems across the industry, agriculture, business and residential sector. This paper describes the cogeneration in general, its application, classification and characteristics. It also describes various cogeneration plants on board, their principle and the advantages and disadvantages of individual processes. This paper contains analysis of cogeneration systems and their comparison, especially on board ships. The paper uses results of other authors to analyze on board systems and to suggest optimal solutions for various ship types. The papers aim to became one of the tools for project engineers and operation engineers.

SEC/ICP-MS studies of heavy metal complexes with humic substances in compost extract

Kralj P., Veber M.

Chemia Analityczna

2007

Vol. 52, No. 1

67-81

Binding of metals to humic substances in compost extract has been studied. An instrument for size exclusion chromatography coupled on-line with diode array detector and inductively coupled plasma mass spectrometer was used for the studies. The above hyphenated system was optimized prior to the measurements. Continuous flow of 10 mmol L-1 trisfhydroxymethyl)aminomethane through the mass spectrometric system required the use of internal standardization method for signal correction and mixed argon-oxygen plasma to avoid interferences caused by carbon. The results of our studies have showed different distributions of the elements among molecular size fractions of humic substances in compost extract.

W ekstrakcie kompostu badano wiązanie metali z substancjami humusowymi. Do badań stosowano przyrząd do chromatografii żelowej sprzężony z detektorem z matrycą diodową i spektrometrem mas z indukcyjnie sprzężoną plazmą. Ciągły przepływ roztworu 10 mmol LL-1 tris(hydroks) metylo)aminometanu przez układ spektrometru mas wymagał użycia metody normalizacji wewnętrznej do korekcji sygnału oraz mieszanej plazmy Ar-0, aby uniknąć zakłóceń powodowanych przez węgiel. Wyniki badań wykazały, że we frakcjach cząsteczek substancji humusowych o różnych wielkościach, w ekstrakcie kompostu, udział metali był różny.