Development of heat–induction machine for optimized calabash juice extraction/ Crisziel C. Lopez, Irish Kimberly E. Carlos, John Michael S. De Guzman, Moel Jr. L. Dequiña, and Czar Jahn L. Pangindian.--

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Lopez, Crisziel C [author]

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TextPublication details: Manila: Technological University of the Philippines: 2025.Description: xiv, 148pages: 29cmContent type:

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BTH TJ 145 L67 2025

Dissertation note: College of Engineering.-- Bachelor of science in mechanical engineering: Technological University of the Philippines, 2025. Summary: This study aimed to design, fabricate, and evaluate a heat–induction-based machine specifically developed to optimize juice extraction from Crescentia cujete (calabash) fruit. The primary objective was to integrate traditional calabash juice processing methods with modern mechanical and thermal technologies to enhance juice yield, reduce labor, and ensure nutrient preservation. The research employed a developmental research design with prototyping techniques, encompassing machine conceptualization, fabrication, performance testing, nutritional analysis, and economic evaluation. The prototype consisted of a cooking vessel with a stirrer and induction heating system, a screw press for juice extraction, a strainer, and a structural frame. Performance testing across three trials showed that the machine could consistently process 10 kilograms of calabash pulp within 40 minutes and extract an average of 7.95 liters of juice, surpassing the 75% target yield. Nutritional analysis confirmed the presence and retention of bioactive compounds such as alkaloids, flavonoids, and polyphenols, indicating minimal nutrient degradation due to controlled heating. The economic evaluation revealed a profit of ₱3,226.88 per batch and a payback period of approximately 11.6 months, confirming the machine’s financial viability. The developed heat-induction calabash juice extraction machine proved technically feasible, nutritionally reliable, and economically sustainable. The system offers a practical and scalable solution for local juice processors and small agribusinesses, especially in rural communities. The study recommends future improvements in automation, waste utilization, and adaptation for other indigenous fruits to expand the machine's applicability and impact.

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Item type	Current library	Shelving location	Call number	Copy number	Status	Date due	Barcode
Bachelor's Thesis COE	TUP Manila Library	Thesis Section-2nd floor	BTH TJ 145 L64 2025 (Browse shelf(Opens below))	c.1	Not for loan		BTH0006409

Bachelor's thesis

College of Engineering.-- Bachelor of science in mechanical engineering: Technological University of the Philippines, 2025.

Includes bibliographic references and index.

This study aimed to design, fabricate, and evaluate a heat–induction-based machine
specifically developed to optimize juice extraction from Crescentia cujete (calabash) fruit. The
primary objective was to integrate traditional calabash juice processing methods with modern
mechanical and thermal technologies to enhance juice yield, reduce labor, and ensure nutrient
preservation. The research employed a developmental research design with prototyping
techniques, encompassing machine conceptualization, fabrication, performance testing, nutritional
analysis, and economic evaluation.
The prototype consisted of a cooking vessel with a stirrer and induction heating system, a
screw press for juice extraction, a strainer, and a structural frame. Performance testing across three
trials showed that the machine could consistently process 10 kilograms of calabash pulp within 40
minutes and extract an average of 7.95 liters of juice, surpassing the 75% target yield. Nutritional
analysis confirmed the presence and retention of bioactive compounds such as alkaloids,
flavonoids, and polyphenols, indicating minimal nutrient degradation due to controlled heating.
The economic evaluation revealed a profit of ₱3,226.88 per batch and a payback period of
approximately 11.6 months, confirming the machine’s financial viability.
The developed heat-induction calabash juice extraction machine proved technically
feasible, nutritionally reliable, and economically sustainable. The system offers a practical and
scalable solution for local juice processors and small agribusinesses, especially in rural
communities. The study recommends future improvements in automation, waste utilization, and
adaptation for other indigenous fruits to expand the machine's applicability and impact.

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