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Review of the Characteristic Curves of Silkworm Cocoon Hot air Drying and its Technological Configuration

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Przegląd charakterystycznych krzywych suszenia gorącym powietrzem kokonu jedwabnika
Języki publikacji
To pass on Chinese cocoon-drying technology to developing countries, this paper reviews characteristic curves of silkworm cocoon hot air drying and its recent research advances in cocoon-drying technology in China based on the epochal and regional characters of cocoon drying technology development. (1) Three characteristic curves of cocoon drying are systematically explained, each of which can be divided into preheating, constant speed, and deceleration stages. The temperature susceptibility (i.e., the characteristics of response to temperature conditions) curve of the pupa successively shows heating, constant temperature, and heating processes. (2) Changes in the drying speed and temperature susceptibility of a fresh cocoon layer and naked pupae were examined in detail before and after pupae were killed in the preheating stage. It is proposed that heating the cocoons as soon as possible during the preheating stage of cocoon drying improves the work efficiency and cocoon quality. (3) The effects of the temperature and humidity of the hot air on the cocoon drying speed (i.e., speed coefficients) are obtained using the enthalpy psychrometric chart. The parameter configuration of cocoon drying technology is elaborated according to the speed coefficients in combination with the characteristic curves of cocoon drying and the influence of the laws of cocoon drying technology on cocoon quality. Furthermore, problems in the technological configuration and the direction of future development are noted.
Aby przekazać chińską technologię suszenia kokonów krajom rozwijającym się, w artykule przedstawiono charakterystyczne krzywe suszenia gorącym powietrzem kokonu jedwabnika oraz najnowsze osiągnięcia w dziedzinie technologii suszenia kokonów w Chinach w oparciu o epokowe i regionalne cechy technologii suszenia kokonów. Przedstawiono trzy charakterystyczne krzywe suszenia kokonów, które można podzielić na etapy podgrzewania wstępnego, stałej prędkości i spowalniania. Zbadano szczegółowo zmiany w szybkości i prędkości suszenia świeżej warstwy kokonu i nagich poczwarek przed i po zabiciu poczwarek na etapie wstępnego podgrzewania. Zaproponowano jak najszybsze podgrzewanie kokonów podczas etapu wstępnego suszenia kokonu, co wpływa na poprawę wydajność pracy i jakość kokonu. Wpływ temperatury i wilgotności gorącego powietrza na prędkość suszenia kokonu (tj. współczynniki prędkości) oceniono stosując wykres psychrometryczny entalpii. Konfigurację parametrów technologii suszenia kokonów opracowywano na podstawie analizy uzyskanych współczynników prędkości, charakterystyk krzywych suszenia kokonu i wpływu technologii suszenia na jakość kokonu.
Opis fizyczny
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  • Southeast University, Civil Engineering & International Institute for Urban Systems Engineering, Nanjing, 210096, China
  • Jiangsu Vocational College of Agriculture and Forestry, Department of Landscape Architecture, Jurong 212400, China
  • Jiangsu Vocational College of Agriculture and Forestry, Department of Landscape Architecture, Jurong 212400, China
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Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
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