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Gromadzenie i przechowywanie energii cieplnej za pomocą akumulatora kamiennego jest niezwykle ekonomicznym i prostym rozwiązaniem. Oszacowanie temperatury wewnątrz złoża dla wybranej fazy, w oparciu o żądane wymiary jest procesem niezwykle trudnym oraz czasochłonnym (konieczność przeprowadzenia doświadczenia naturalnego). Sztuczne sieci neuronowe, ich aplikacje i liczne cechy charakterystyczne pozwoliły...
Accumulation of thermal energy involves three operational phases: loading, storage and unloading of a storage unit. All the three phases deal with heat transfer, and randomness is a pertinent feature of the process. In this paper an attempt was made to identify physical quantities contributing to the stochastic character of the thermal energy storage in a pebble bed. Probalistic models were developed...
Jednym z najczęściej spotykanych w praktyce źródeł ciepła, wykorzystywanych w procesie ładowania kamiennego magazynu energii cieplnej, są baterie słoneczne. Urządzenia te, wykorzystując zjawisko fotoelektryczne, transformują energię emitowaną przez słońce, do postaci umożliwiającej jej efektywne magazynowanie np. w akumulatorach kamiennych. Ze względu na stochastyczny charakter zjawisk meteorologicznych...
The sollar collectors take advantage of photoelectric energy to transform solar energy into a form effectively storable in e.g. pebble bed stores. Due to the stochastic nature of meteorological phenomena and the random character of electromagnetic wave propagation in the atmosphere (Sobczyk, 1982), one must consider the thermal parameters of the absorbed energy collected using the method to be random...
The efficiency of the system composed of a rock bed heat storage system depends on the degree of the non-uniformity of air flow through the rock bed. The subject of the article is focused on this phenomenon occurring in a horizontal rock bed heat storage system. The experiment was performed on a test stand where the velocity of the heat front was measured. The results were used to determine the relative...
Due to the distribution of the geometric dimensions of pebbles inside the heat storage system, the mathematical model describing the charging process of the above mentioned storage system must be verfied. Taking account of the stochastic nature of the parameters of the pebble bed in the calculations implies the occurrence random results. The paper presents the use of the numeric simulation technique...
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