Drying characteristics and quality of lemon slices dried under Coulomb force-assisted heat pump drying

2020 ◽  
pp. 1-12
Author(s):  
Yong Hong Lee ◽  
Siew Kian Chin ◽  
Boon Kuan Chung
Keyword(s):  
Heat Pump ◽  
Coulomb Force ◽  
Drying Characteristics ◽  
Heat Pump Drying

scholarly journals Drying characteristics and quality of lemon slices dried undergone Coulomb force assisted heat pump drying

2018 ◽  
Author(s):  
S. K. Chin ◽  
Y. H. Lee ◽  
B. K. Chung
Keyword(s):  
Vitamin C ◽  
Heat Pump ◽  
Coulomb Force ◽  
Total Phenolic ◽  
Drying Rate ◽  
Total Energy Consumption ◽  
Drying Time ◽  
Drying Characteristics ◽  
Heat Pump Drying

In this research, a Coulomb force assisted heat pump (CF-HP) dryer was invented for the purpose of improving the drying characteristics and product quality of biomaterials. As compared to heat pump drying alone, the assistance of Coulomb force in heat pump dryer enhanced the drying rates and effective moisture diffusivity of lemon slices up to 26%, which eventually shortened the total drying time to 40%. This saved the total energy consumption of HP drying by 31.5%. High retention of vitamin C and TPC were also found in CF-HP dried slices due to mild drying temperature and fast drying rate. Keywords: Coulomb force; Heat pump drying; Drying rate; Vitamin C; Total Phenolic Content (TPC).  

scholarly journals ENERGY SAVING TECHNOLOGIES FOR DRYING OF HEAT-SENSITIVE MATERIALS

2019 ◽  
Vol 41 (4) ◽  
pp. 5-12
Author(s):  
Yu.F. Sniezhkin ◽  
Xiong Jian ◽  
D.M. Chalaev ◽  
М.М. Ulanov ◽  
N.О. Dabizha
Keyword(s):  
Heat Pump ◽  
Thermal Conditions ◽  
High Energy ◽  
Heat Pumps ◽  
Convective Drying ◽  
Drying Time ◽  
Long Duration ◽  
Heat Pump Drying ◽  
Promising Development

The promising development of convective drying of thermolabile materials is the use of heat pumps. The main advantages of heat pump drying are high energy efficiency, controlled thermal conditions of drying, high quality of the final product, environmental cleanliness of the technological process.The processes of air treatment in convective heat pumps with different schemes of dehydration of the drying agent are considered in the paper. As determined, the main disadvantage of heat pump drying is the long duration of the process due to the drying temperature limitation not exceeding 50-60 °C, and the dried material is not initially heated above the temperature of the wet thermometer, which is 25-30 °C. The possibility of using infrared radiation in combination with a heat pump was studied to intensify the process of low-temperature convective drying. It is shown that the combination of heat pump and infrared drying processes provides a synergistic effect, which leads to a shorter drying time and reduced energy consumption, as well as to obtain better quality dried products.

Study on drying bamboo shoots by Sasaki heat pump drying technology

2021 ◽  
Vol 63 (6) ◽  
pp. 57-62
Author(s):  
Thi Bac Doan ◽  
◽  
Thu Hang Ta ◽  
Dac Binh Minh Nguyen ◽  
Thi Hoang Lan Nguyen ◽  
...  
Keyword(s):  
Heat Pump ◽  
Salt Concentration ◽  
Color Variation ◽  
Food Hygiene ◽  
Bamboo Shoots ◽  
Heat Pump Drying ◽  
Drying Technology ◽  
Water Compensation ◽  
Cyanide Content

The study was conducted to investigate the effects of blanching regimes at the salt concentration and drying temperature using Sasaki heat pump drying technology on the quality of dried bamboo shoots to create a product that can be kept color, flavour, and quality. Fresh bamboo shoots were cut into slices with a thickness of 6 mm, boiled in hot saltwater at 100oC at different concentrations (0, 1, 3, 5%) for 15 minutes. Then, they were dried in the temperature setting differences (30, 40, 50oC) by Sasaki dryers and tested for moisture, color, cyanide content, microorganisms, water compensation capacity, and product sensory quality. Fresh bamboo shoots were boiled in hot saltwater at 100oC, 3% salt concentration for 15 minutes, and dried at 40oC by Sasaki drier for the best quality. This treatment mode provides the lowest color variation and the best water compensation compared to other treatment modes. Dried bamboo shoots are bright yellow, uniform color, characteristic odour, toughness with little deformation, low cyanide content, and microbiological content below the threshold of food hygiene and safety.

Drying characteristics of Shiitake mushroom and Jinda chili during vacuum heat pump drying

2010 ◽  
Vol 88 (2-3) ◽  
pp. 105-114 ◽  
Author(s):  
Apichart Artnaseaw ◽  
Somnuk Theerakulpisut ◽  
Chatchai Benjapiyaporn
Keyword(s):  
Heat Pump ◽  
Shiitake Mushroom ◽  
Drying Characteristics ◽  
Heat Pump Drying

Drying characteristics of Orthosiphon stamineus Benth by solar-assisted heat pump drying

2017 ◽  
Vol 35 (14) ◽  
pp. 1755-1764 ◽  
Author(s):  
Shu Hui Gan ◽  
Mei Xiang Ng ◽  
Thing Chai Tham ◽  
Lee Suan Chua ◽  
Ramlan Aziz ◽  
...  
Keyword(s):  
Heat Pump ◽  
Drying Characteristics ◽  
Orthosiphon Stamineus ◽  
Heat Pump Drying

Effect of Ultrasound on Heat Pump Drying Characteristics of Pea Seeds

2018 ◽  
Vol 14 (11-12) ◽  
Author(s):  
Zhichao Tao ◽  
Zhao Yang ◽  
Fei Yu ◽  
Zongyu Yang
Keyword(s):  
Heat Pump ◽  
Seed Viability ◽  
Moisture Diffusion ◽  
Drying Characteristics ◽  
Drying Temperature ◽  
Power Frequency ◽  
Pea Seeds ◽  
Heat Pump Drying ◽  
Kinetics Of ◽  
Ultrasound Power

Abstract For the purpose to study the effect of ultrasound treatment on heat pump drying, the experiments were conducted on pea seeds at drying temperature of 30, 35 and 40 °C , ultrasound power of 0, 60 and 100 W and frequency of 0, 28 and 40 kHz. The influence of ultrasound and temperature on the drying process was studied by analyzing the drying characteristics of pea seeds. The results demonstrated that increasing the ultrasound power, frequency and drying temperature can improve the drying rate and the Midilli model can describe the drying kinetics of pea seeds well. The effective moisture diffusion coefficient increased with the increase of ultrasound power, frequency and drying temperature, while there was no obvious trend for the change of seed activation energy under different conditions. The seed viability was promoted with the raise of ultrasound power and fell when increasing drying temperature.

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