Pengembangan Prototipe Gas Analyzer untuk Pengukuran CO2 dan CH4 pada Gas Buang Kapal

Tamam, Rezza Ramadhan (2026) Pengembangan Prototipe Gas Analyzer untuk Pengukuran CO2 dan CH4 pada Gas Buang Kapal. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5019221007-Undergraduate_Thesis.pdf - Accepted Version Download (4MB)

Abstract

Emisi CO2 dan CH4 dari kapal non konvensional bermesin diesel di Pantai Kenjeran, Surabaya, belum banyak diukur langsung karena keterbatasan alat ukur portabel yang murah dan mudah diaplikasikan. Penelitian ini mengembangkan prototipe gas analyzer berbasis mikrokontroler ESP32 dengan sensor NDIR untuk CO2 dan sensor MOS MQ-4 untuk CH4, dilengkapi sistem pengambilan sampel gas, pompa udara, LCD, dan catu daya, yang dikalibrasi terhadap alat uji emisi Laboratorium MPP. Hasil kalibrasi menunjukkan deviasi pembacaan CO2 sebesar 1,26-1,89% dan selisih emission factor 8,16-11,01%, sedangkan CH4 masih menunjukkan error 21,69-34,09% sehingga belum layak digunakan tanpa faktor koreksi. Data emisi terukur digunakan menyusun Baseline Actual Value (BAV) kondisi Business As Usual (BAU), yaitu 15.515,78 kg CO2/tahun dan 3,164 kg CH4/tahun untuk bahan bakar B0. Pemilihan bahan bakar alternatif B0, B35, dan B40 dilakukan dengan metode Analytic Hierarchy Process (AHP) dan TOPSIS berdasarkan lima kriteria teknis-ekonomis-lingkungan, menghasilkan B40 sebagai alternatif terbaik dengan closeness coefficient tertinggi 0,904. Perbandingan emisi menggunakan Life Cycle Assessment (LCA) Tank to Wake menunjukkan B40 memberikan reduksi intensitas emisi CO2e terbesar, yaitu 4,36% (GWP20) dan 4,39% (GWP100) terhadap B0. Hasil ini mengindikasikan substitusi biodiesel B40 efektif secara statistik namun tidak memadai sebagai strategi tunggal dekarbonisasi sektor maritim, sehingga diperlukan intervensi tambahan di luar substitusi bahan bakar.
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CO2 and CH4 emissions from non conventional diesel-engine vessels at Kenjeran Beach, Surabaya, have not been widely measured directly due to the limited availability of portable, low-cost, and easy-to apply measuring instruments. This study develops a gas analyzer prototype based on an ESP32 microcontroller, using an NDIR sensor for CO2 and a MOS MQ-4 sensor for CH4, equipped with a gas sampling system, air pump, LCD, and power supply, calibrated against the emission testing instrument at the MPP Laboratory. Calibration results show a reading deviation of 1.26-1.89% and an emission factor difference of 8.16–11.01%, while CH4 still shows an error of 21.69-34.09%, indicating it is not yet suitable for use without a correction factor. The measured emission data were used to establish the Baseline Actual Value (BAV) under Business As Usual (BAU) conditions, namely 15,515.78 kg CO2/year and 3.164 kg CH4/year for B0 fuel. The selection of alternative fuels B0, B35, and B40 was carried out using the Analytic Hierarchy Process (AHP) and TOPSIS methods based on five technical economic environmental criteria, resulting in B40 as the best alternative with the highest closeness coefficient of 0.904. Emission comparison using Tank to Wake Life Cycle Assessment (LCA) shows that B40 provides the largest reduction in CO2e emission intensity, namely 4.36% (GWP20) and 4.39% (GWP100) relative to B0. These results indicate that B40 biodiesel substitution is statistically effective but inadequate as a standalone decarbonization strategy for the maritime sector, so additional interventions beyond fuel substitution are needed.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	gas analyzer, CO2, CH4, kapal non konvensional, AHP-TOPSIS, Life Cycle Assessment, gas analyzer, CO2, CH4, non conventional vessels AHP-TOPSIS, Life Cycle Assessment
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD883.5 Air--Pollution V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM276.A1 Fuel (Including supplies, costs, etc.) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Rezza Ramadhan Tamam
Date Deposited:	01 Aug 2026 07:00
Last Modified:	01 Aug 2026 07:00
URI:	http://repository.its.ac.id/id/eprint/141384

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