Drying strategy using power density control to improve quality
of dried products has been successful, since the formation of black
spots on dried tomatoes, linked to strongly uneven heating and
drying, was avoided. Moreover, the microwave-dried tomatoes
showed better structure, better texture and better retention of
nutriments than hot air-dried tomatoes. Two strategies of MWHA
with and without power density control (called respectively strategy 2 and 1) were investigated to see the impact of MWHA on
tomatoes. Strategy 2 was the best, since it allowed better control
of the temperature within the product at the last stage of drying.
This led to obtaining color parameters (L
, a
, b
) of dried tomato
close to those of fresh tomato. In addition, the texture of tomatoes
dried by strategy 2 was less firm (therefore better) than those dried
with strategy 1. In order to improve the process control proposed
here for the MWHA drying of tomatoes, a relationship could be
established between an indirect measurement of product moisture
(e.g. by infrared) and output power. This relationship might be
implemented in the LabView control program to adapt the output
power to the product moisture content throughout drying. Such a
relationship, would make possible the industrial transfer of MWHA
drying
Drying strategy using power density control to improve quality
of dried products has been successful, since the formation of black
spots on dried tomatoes, linked to strongly uneven heating and
drying, was avoided. Moreover, the microwave-dried tomatoes
showed better structure, better texture and better retention of
nutriments than hot air-dried tomatoes. Two strategies of MWHA
with and without power density control (called respectively strategy 2 and 1) were investigated to see the impact of MWHA on
tomatoes. Strategy 2 was the best, since it allowed better control
of the temperature within the product at the last stage of drying.
This led to obtaining color parameters (L
, a
, b
) of dried tomato
close to those of fresh tomato. In addition, the texture of tomatoes
dried by strategy 2 was less firm (therefore better) than those dried
with strategy 1. In order to improve the process control proposed
here for the MWHA drying of tomatoes, a relationship could be
established between an indirect measurement of product moisture
(e.g. by infrared) and output power. This relationship might be
implemented in the LabView control program to adapt the output
power to the product moisture content throughout drying. Such a
relationship, would make possible the industrial transfer of MWHA
drying
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กลยุทธ์ที่ใช้ควบคุมความหนาแน่นของพลังงานเพื่อปรับปรุงคุณภาพของผลิตภัณฑ์ได้รับความสำเร็จ
แห้ง แห้ง เนื่องจากการก่อตัวของจุดสีดำ
มะเขือเทศแห้ง เชื่อมโยงกับความร้อนไม่เท่ากันอย่างมากและ
แห้ง คือหลีกเลี่ยง นอกจากนี้ ไมโครเวฟแห้งมะเขือเทศ
แสดงดีกว่าโครงสร้าง เนื้อดีกว่าและความคงทนดีกว่า
nutriments กว่าอากาศร้อนแห้งมะเขือเทศ สองกลยุทธ์ mwha
with and without power density control (called respectively strategy 2 and 1) were investigated to see the impact of MWHA on
tomatoes. Strategy 2 was the best, since it allowed better control
of the temperature within the product at the last stage of drying.
This led to obtaining color parameters (L
, a
, b
) of dried tomato
close to those of fresh tomato. In addition, the texture of tomatoes
dried by strategy 2 was less firm (therefore better) than those dried
with strategy 1. In order to improve the process control proposed
here for the MWHA drying of tomatoes, a relationship could be
established between an indirect measurement of product moisture
(e.g. by infrared) and output power. This relationship might be
implemented in the LabView control program to adapt the output
power to the product moisture content throughout drying. Such a
relationship, would make possible the industrial transfer of MWHA
drying
การแปล กรุณารอสักครู่..
