ANALISIS KINERJA KOTAK ISOTERMAL Styrofoam PENGHANGAT MAKANAN SIAP SAJI BERBASIS Positive Temperature Coefficient (PTC)

Tri Wira, Utama (2026) ANALISIS KINERJA KOTAK ISOTERMAL Styrofoam PENGHANGAT MAKANAN SIAP SAJI BERBASIS Positive Temperature Coefficient (PTC). S-1 thesis, 021008 Universitas Tridinanti.

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Abstract

Online food-delivery services are growing rapidly, yet keeping ready-to-eat food above 60°C during two-wheeled delivery remains challenging, as it risks entering the microbiological danger zone (4–60°C); prior studies on Positive Temperature Coefficient (PTC) heaters have been limited to static applications and have not evaluated dynamic distribution conditions. This study analyzes the performance of a PTC heating system integrated into an aluminum-foil-lined styrofoam isothermal box in maintaining food temperature at 60–70°C, calculates heat loss (Q_loss) and energy efficiency, and examines the effect of travel distance on both variables. A quantitative experimental method with an applied Research and Development approach was used, involving field trials on a motorbike in Palembang City across distances of 2, 4, and 6 km, each replicated three times under light and congested traffic, analyzed using Fourier's conduction law, one-sample t-test, and Pearson correlation. Results show average energy efficiency of 82.49% (light traffic) and 80.79% (congested traffic), significantly exceeding the 50% target (p < 0.001), with Q_loss increasing linearly with distance (r = 0.984 - 0.975; p < 0.001). Success in keeping food above 60°C rose from 33.3% to 88.9% when initial food temperature was raised from 62.85°C to 72.55°C. The PTC heating system is concluded to be effective and efficient for dynamic distribution, though its success depends heavily on an adequately high initial food temperature before delivery. Keywords: PTC heating element, styrofoam isothermal box, heat loss (Q_loss), energy efficiency, ready-to-eat food safety

Item Type:	Thesis (S-1)
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Fakultas Teknik > S1 Teknik Mesin
Depositing User:	Tn TRI WIRA UTAMA
Date Deposited:	20 Oct 2026 02:21
Last Modified:	20 Oct 2026 02:21
URI:	http://repository.univ-tridinanti.ac.id/id/eprint/11539

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