PNU Journal of Applied Science, Engineering & Technology

A Review on Electric Vehicles Technology: Batteries and Charging System

Prathan Srichai — 2023-12-28

This academic article has gathered information on current electric vehicle technology, discussing in detail the environmental impact of internal combustion engines (ICE), the types of electric vehicles used today, the use of electric vehicles in Thailand, as well as their use in other countries. It also presents the advantages and disadvantages of electric vehicle usage to aid decision-making. One significant aspect covered is the factors involved in establishing charging stations for electric vehicles, such as the types of chargers, charging processes, and battery charging techniques. All the information presented was based on knowledge intended for individuals interested in using electric vehicles as their daily mode of transportation, ensuring safety and cost savings.

The Development of Cloud Warehouse System for Nicha Style Shop Network

Nattapong Chotipan — 2023-12-28

This research aims to develop an online inventory monitoring system for Nicha style shop network and to simplify the process, time, and cost of traditional inventory checks that use phone calls to other branches in the network. Since the current business process has an order acceptance step. Checking the inventory of stores in the network has several steps and lose costs for checking stock. The research therefore applied the Google App Sheet system to create a product database and use excel sheet to store product data online for inspection of products in every branch in the network and can immediately cut stock in the confirmed branch, as well as adjust business processes so that the confirmed branch can deliver products according to online orders. This allows the Nicha Style shop network to reduce steps, time, and product inspection costs by 2,920 baht per year. And the research used questionnaires to evaluate the system. It was found that employees in the network of Nicha Style Shops used the system with ease, with the system receiving a satisfaction score of 80 percent.

Application on Dashboard Technology to Data Analyze the Characteristics Students in the Faculty of Engineering, Princess of Naradhiwas University

Muhamadamirul Yusoh — 2023-12-28

The purpose of this research is to analyze the identity of the students of the Faculty of Engineering Princess of Naradhiwas University. The population used in this study in the academic year 2018-2022. The total number of students is 624, and Google Data Studio is used as a tool to apply dashboard analysis technology. The general data used includes gender, religion, hometown, high school, study plan, type of admission round, special abilities, and parental income.

The study found that the characteristics of students that affect their decision to study in the Faculty of Engineering Princess of Naradhiwas University was predominantly male, accounting for 61.7%. They also found that 90.1% of the students identified as Muslim. The majority of the students came from three provinces in the southern border area of Thailand, accounting for 96.55% of the students, with the highest proportion being from Narathiwat province at 74.76%. In terms of educational background Narathiwat Technical College 10.19% and Attarkiah Islamiah Institute 7.99%. Among the various admission rounds, the Portfolio round had the highest number of applicants at 22.9%. Notably, 33.4% possessed skills in sports, while 8.8% demonstrated computer skills.
The average parental income was found to be below 80,000 Baht per year for 33.7% of the students.

Compressive Strength Water Absorption and Voids of Lightweight Mortar using High Level of Pumice Stone as Aggregate Replacement

Krit Pomsona — 2023-12-28

The purpose of this research is to study the possibility of using high level of pumice stone as aggregate to produce lightweight mortar. The aggregate was replaced with pumice stone at 0, 50, 75 and 100 %wt. The water requirement, compressive strength, water absorption and voids of mortar were evaluated. The results show that water requirement of mortar was increased with increasing in pumice stone. The W/C ratio of the mortar using pumice stone were 1.18 to 1.54, while control mortar was 0.64. The compressive strength of the mortar decreased with an increase in level of pumice stone. The using pumice stones at 50% resulted in the highest compressive strength. The PS50 mortar had compressive strengths of 112.2, 172.0 and 178.7 ksc at ages 7, 28 and 60 days, respectively and can be used for lightweight structures according to ACI 213 standards. The used of pumice stone as aggregate had a significant effect on reducing unit weight of mortar. This due to pumice stone had low specific gravity. The water absorption increased with an increase in pumice stone and was directly related to voids.

The Reliability Index Analysis of the Suitable Electricity Distribution System; Case study Sungai Kolok PEA

Supipat Panichtanakom — 2023-12-28

This paper presents forecasting results of the reliability index for the electric energy distribution system consists of the system average interruption frequency index (SAIFI) and the system average interruption duration index (SAIDI) based on the regression analysis and the average value of previous data. The controlable factor and uncontrollable factor are the scenario for study. The analysis results show that the reliability index tends to decrease when increase maintaince frequency. However, data should be increased for more high reliability index results.

Development of a Mobile Solar Powered Spotlight

Palakorn Prommet — 2023-12-28

This paper presents the development of a mobile solar powered spotlight. With the objective of designing and developing portable spotlight for practical use in areas that require illumination during the night, working in emergency conditions or in the event that the main electrical system is still inaccessible. By using solar energy as the main power source for the system operation, which consists of a flood light type L.E.D. 50 watts with a 12 volt battery with a capacity of 65 ampere-hours. It is not connected to the main power system from the house or the low voltage distribution system of the Electricity Authority, which uses a 250 watt polycrystalline solar panel is a source of electrical energy, there is a charge control system that can set a total of 7 types of work. Which is placed on a structure made of galvanized steel with wheels that can be moved to the desired area, and can adjust the height of the flood light, so that can adjust the beam angle to illuminate according to need.

Binder Materials and Mix Proportion of Geopolymer

Abideng Hawa — 2023-12-28

The growth of demand for cement concrete around the world concerns the destruction of natural resources. Geopolymer materials show promise as a sustainable alternative to cement concrete. Pozzolan materials such as fly ash, metakaolin, slag, and palm oil ash have different chemical compositions. Various binder to alkaline, sodium silicate to sodium hydroxide, sand to the binder, and stone to binder mixed to geopolymer. Outstanding reviews papers undertaken to quantify and understand the effects of the variable mentioned for compressive strength in the literature. The review also provides insights into research gaps in this field to promote geopolymer research in the future.