Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 136

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 7 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 7 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
In the Water Rail the patterns of the two main types of vocalization were quite different: the announcement call was uttered throughout the breeding season with two peaks, one in April and the other in early June, but the courtship call occurred only in the pre-laying period. The vocalization period of the Little Crake is short but intensive, peaking before the start of incubation. In general, Water Rails produced more vocalizations in the evening than in the morning. The vocal activity of the Little Crake peaked at dawn. In both species a peak in vocal output occurred shortly before sunrise and before sunset.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Ekonomiczna analiza produkcji energii z biomasy

100%
The analysis of amount of the thermal and electric energy produced by utilizing one type of biomass and organic additions as well as the realization of economical analysis of conversion of primary energy of the batch to the end electric and thermal energy were the aim of this work. Investigations were conducted at the biogas production station Kapużany equipped with the cogeneration unit of 120 kW in power. As basic fermentative raw material maize was used besides liquid manure and dung that were used as additions. It was stated that with help of the applied cogeneration unit the acreage needed to maize cultivation was ca 70 ha. It is possible to produce 16 800−19 600 kWh of electricity and ca from 14 000 to 16 000 kWh of heat from 1 ha. The profit achieved from annual exploitation of the biogas station was 869 400 Sk.
The paper presents the practical results of the performance with the biodiesel and their mixtures with different quantity of fermented ethanol. The ZETOR trademark Czech agricultural tractor and the AVIA trademark Czech truck engines were used in the experiments. Based on the results, it can be said that the most suitable fuel blend is: biodiesel + 2% addition of fermented bioethanol according to following points. This addition significantly reduces the NOₓ emissions. In the AVIA engine the reduction is about 54% in comparison with non additived fuel (0% fuel blend). In the Zetor engine, it decreased by 88% of its primary value. Even in the case of smokiness, the situation is similarly favourable. The power output parameters are almost constant. No significant increase of fuel consumption was observed. However higher share of unburned hydrocarbons depending on increased alcohol content was observed. In with comparison to the commercially available petrol diesel, the total amount of emissions at the fuel blends (especially with small content of alcohol) was lower in all cases, which facilitates the realization of emission limits also in the older types of engines.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 7 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.