DSpace-CRIS

Now showing 1 - 3 of 3

Some of the metrics are blocked by your
consent settings
An assessment of technical feasibility and interannual variability for utility scale wind energy development at five favourable locations in Myanmar
(2026-12-01)
Htike, Thein Min
;
Soe, Paing Hein
;
Phyo, Mi Zwe Mon
Myanmar’s projected electricity demand of 14.542 GW by 2030 and its Intended Nationally Determined Contribution (INDC) underscore the necessity of diversifying the national energy mix to enhance environmental sustainability. Solar and wind energy are targeted to contribute 9% of the total installed capacity. Consequently, a reliable assessment of renewable resources is essential for guiding investment and policy decisions. Although prior studies have mapped wind speed and power density, detailed analyses of the spatial and temporal variability of wind resources for energy production remain limited. This study evaluates wind conditions using 2010–2017 ERA5 data, focusing on mean wind speed, power density, predominant wind direction, and temporal variations at yearly, seasonal, monthly, and diurnal scales. Crucially, this work extends traditional assessments by quantifying wind persistence through autocorrelation and evaluating the Interannual Variability (IAV) of Annual Energy Production (AEP) to assess meteorological risks. Five potential locations were selected for detailed analysis using two utility-scale turbines. Annually, hours with wind speeds exceeding 6 m/s account for 23.21–35.08%, while hours with wind speeds exceeding 4 m/s represent 50.26–64.29%. Results identify Ngapudaw (Ayeyarwaddy) as the most favorable site, with an average AEP of 5.05 GWh, a capacity factor of 23.08%, and a moderate risk profile (7.83% IAV). While coastal site Sittwe exhibits high energy potential, it also presents greater interannual fluctuations (9.10% IAV); in contrast, inland sites like Wundwin offer exceptionally stable resources with an IAV < 5%. This quantitative assessment confirms the technical viability of wind power in Myanmar and supports further exploration of site-specific opportunities to expand renewable energy deployment. These findings provide a foundational justification for stakeholders, including investors and policymakers, to advance wind farm development, contributing to Myanmar’s environmental protection and sustainability goals in alignment with UN Sustainable Development Goals (SDGs) 7 (Affordable and Clean Energy) and 13 (Climate Action).
Some of the metrics are blocked by your
consent settings
Particle emission and thermal efficiency analysis of a diesel vehicle using biodiesel and a platinum metallic partial-flow particulate filter
(2025-01-01)
Dang, Huy Quang
;
Phyo, Mi Zwe Mon
;
Thaeviriyakul, Poonnut
;
Cosh, Plan Teekatasn
;
Srilomsak, Mek
Harmful emissions from diesel vehicles, particularly unmodified ones, pose significant concerns for human health and the environment, underscoring the urgency to address these issues. This study investigated the effects of commercial fuels, B10, B20, and biodiesel B100, used with a metallic partial-flow catalyzed diesel particulate filter (P-CDPF), on a light-duty unmodified diesel vehicle's thermal efficiency and emissions characteristics. The initial test was conducted on a chassis dynamometer to measure the fuel flow rates at three different engine speeds, 1500, 2000, and 2500 rpm, with four loads, 84, 112, 140, and 160 Nm. This was done to evaluate brake-specific fuel consumption and brake thermal efficiency under steady-state conditions. The second test followed the new European driving cycle to examine emission factors of regulated pollutants under both urban and highway driving conditions. The results indicated that BSFC values increased with the biodiesel ratio in the blends, attributed to lower heating values. However, higher oxygen contents with increasing biodiesel ratios led to more complete combustion and improved brake thermal efficiency. Installation of a P-CDPF had a minimal impact, resulting in less than a 3.4% increase in the BSFC and a 1% decrease in brake thermal efficiency across all tested fuels, owing to its relatively low pressure drop. Increasing the biodiesel ratio from B10 and B20 to B100 resulted in reductions of up to 32% of particulate mass and 45% of particulate number in vehicle emissions. P-CDPF installation further reduced particulate mass by over 60% and particulate number by 36% across all tested fuels, demonstrating its effectiveness in trapping and passively oxidizing particulate matter. Furthermore, the P-CDPF significantly reduced harmful gases with addition of a catalytic coating. A combination of a P-CDPF and commercial biodiesel fuels emerges as an effective solution for reducing regulated emissions from unmodified diesel vehicles.
Some of the metrics are blocked by your
consent settings
CHARACTERIZATION OF FOUR BALL METALLIC WEAR MECHANISMS USING SCANNING ELECTRON MICROSCOPY
(2022-09-14)
Phyo, Mi Zwe Mon
;
Karin, P.
;
Khamsrisuk, P.
;
Srilomsak, M.
;
Charoenphonphanich, C.
Nowadays, lubricants play an important role in several automotive industries around the world because they reduce friction and wear on engines moving parts such as piston ring, cylinder liner and valve control systems of compression ignition engines. The aim of this research was to investigate the impact of bio-oil (palm oil) on metallic wear. The tribological test was conducted using a four-ball tribometer as indicated by engineering testing standard ASTM (D4172) under the conditions of 392 N applied load, 75°C and the period of 60 minutes. These four ball surfaces were observed by using 3D Optical Microscope (OM) and Scanning Electron Microscope (SEM) analysis. According to the four-ball wear test, the comparison of average wear scars diameter between two different types of bio-oil and SAE 0W30 engine oil were investigated. Furthermore, wear scar depth from 3D microscope and SEM images of different magnification were compared in the viewpoint of wear mechanism analysis.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results