BIOMEJ

Analysis of Efficiency and Heat Transfer Coefficient in the Performance Evaluation of Shell and Tube Heat Exchanger

S Chalimah — 2024-11-29

Heat transfer is the process of energy transfer from a region of higher temperature to a region of lower temperature, occurring through conduction, convection, and radiation mechanisms. Understanding heat transfer is crucial in various industrial and thermodynamic applications. One commonly used device in this process is the heat exchanger, which allows heat transfer between two fluids with different temperatures without direct mixing. This research aims to evaluate the heat transfer phenomena in heat exchangers and their performance under various operational conditions. The study measured the average temperature difference, kinematic viscosity, Reynolds number, fluid velocity, heat exchanger efficiency, the average heat released and received, and the heat transfer coefficient. The results showed a high heat exchanger efficiency, with an average value of 99.53%. The heat transfer coefficient also showed significant values, varying based on fluid flow type and operational conditions. This study emphasizes the importance of selecting the appropriate type and design of heat exchanger to improve thermal system efficiency and reduce energy consumption.

Coefficient Analysis of Shell and Tube Type Heat Exchangers

Firmansyah Hafizh — 2024-11-29

Heat exchanger is a device used to transfer heat between two fluid systems at different temperatures. In this research, the heat exchanger used is in the form of a shell and tube which studies the mechanism of heat transfer between hot water and cold water both in contra flow. The purpose of this research is to analyze the relationship of heat transfer coefficient with changes in flow regime in shell and tube contra flow heat exchanger. This research was carried out by measuring the inlet and outlet water temperatures for the counter flow configuration, then analyzing the effectiveness calculation using the LMTD method. As a result, the inlet and outlet water temperature values for the counter flow configuration are obtained, then the effectiveness of the heat exchanger is assessed using the LMTD formula where the effectiveness of the heat exchanger for counter flow. The purpose of the research is to understand the heat exchanger system and analyze the performance of the shell and tube heat exchanger.

Data Retrieval on Heat Exchange Machines

Hilza Arrun Geralfine — 2024-11-29

In many industrial processes, heat transfer—the movement of thermal energy from one object or medium to another—is a significant phenomena. Conduction, convection, and radiation are the three primary mechanisms via which this phenomena happens. When a temperature gradient causes heat to go from a hotter to a cooler region in a solid substance, this process is known as conduction. Heat is transferred through a moving fluid (liquid or gas) by convection, which can occur spontaneously as a result of density differences or be induced mechanically by a pump or fan. Unlike the other two methods, radiation includes the movement of energy in the form of electromagnetic waves and does not require a medium.

Analysis Effect of Light Intensity on Efficiency of the GH 100 WP-72 Solar Cell

Ferdi Kurniawan — 2024-11-29

Energy is the main need today, with fossil energy sources increasingly depleting. Therefore, the development of renewable energy, such as solar energy, is very important. This article discusses the efficiency produced by solar cells in research conducted at the Energy Conversion Laboratory of the National Development University "Veteran" East Java. Solar cells are devices that convert solar energy into electrical energy through photovoltaic effects, without producing pollution or greenhouse gases, so they are an environmentally friendly energy source. Data was taken at 10.00-10.30, by measuring battery and solar panel voltage, battery charging current, and solar panel temperature. The experimental method was used by collecting data three times every 15 minutes for 30 minutes. The solar panel used is GH solar type GH 100 WP-72. Efficiency is calculated based on input and output power, with the highest efficiency achieved when the battery is full. The results show the lowest efficiency of 3.67% at 10.40 with a light intensity of 313.24 W/m² and the highest efficiency between 20.76% to 23.52% at 13.20-13.50 with a light intensity of 255.64 W/m² to 289. 61 W/m². Solar cell efficiency is greatly influenced by battery condition and light intensity.