Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Qandil, A." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
The Acoustics of the Catacombs
Autorzy:
Iannace, G.
Trematerra, A.
Qandil, A.
Powiązania:
https://bibliotekanauki.pl/articles/950219.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
catacombs
acoustic measurements
reverberation time
impulse response
Opis:
The catacombs are underground places. This paper reports the results of acoustic measurements carried out inside the catacombs of “San Gennaro” (Naples) and in those one of “San Callisto” (Rome). Originally the catacombs were also used to perform sacred functions, although we don’t know the type of these functions i.e. if they were spoken, sung or performed as psalms. This paper presents acoustic measurements carried out in catacombs using the impulse response method, and by the analysis of the monaural acoustic parameters, (T30, EDT, C80, D50 and STI), the authors intend to understand the type of religious ceremony performed in the catacombs. If the catacombs had been reverberant places, they could not have been used for prayers because the echoes would have created difficulties in concentration and meditation for the devotees due to the poor speech comprehension.
Źródło:
Archives of Acoustics; 2014, 39, 4; 583-590
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Performance Analyses with Frequently Discrete Usage of the Hot Storage Tanks
Autorzy:
Qandil, Ahmed
Al Rababa’a, Khalid
Aljabarin, Nader
Al Ganem, Zaid Abu
Abdullah, Rasheed
Powiązania:
https://bibliotekanauki.pl/articles/123418.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
storage tank
discrete usage
stratification
thermocline thickness
mix number
heat transfer
usable energy
Opis:
Hot water storage tanks are devices with high energy consumption, used widely in residential, industrial and commercial sectors. The hot storage tank is a key device in numerous applications such as electrical heaters, solar thermal storage, solar electrical energy production and many others. Its superior technology is favorable for the designers and has a great impact on the market competition. Hot water storage tanks were studied under continuous usage feature, for different inlet types, flow rates, thermal stratification in static and dynamic modes, both experimentally and numerically. The real discrete usage feature has not been analyzed in a proper way. In this study, the experimental and performance analyses with frequent discrete usage of the hot storage tank were performed. Different flow rates of 3, 6, and 9 l/min with 5, 10 and 20 min discrete usage waiting periods were studied. It was found that the thermocline thickness and mixing number increases for both increasing the flow rate due the increment in turbulent mixing potential and increasing the waiting period due to the increase in heat transfer time available between the hot and cold layers. The real data was drawn as is to permit further analyses and data comparison to other researchers. The effect of waiting periods can be used in solar HST to maximize the efficiency of solar collectors as the solar collector efficiency is high at low temperatures.
Źródło:
Journal of Ecological Engineering; 2019, 20, 1; 52-60
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies