# Mechanical Engineering

### Physical Laws of Motion and Energy Explained

What is motion and what is energy? These fundamental questions are difficult to answer. The first attempt to give some explanations was made through classical mechanics. Here you will find a collection of articles with everything you need to know about the physical laws of motion and energy.

Features and capabilities are equally important, if not more so, than the price for buying CAD software. Even given that, chances are you may find a free program through this guide that is capable enough for your application. This guide will help you to understand the current offerings.

### An Engineering Guide to Air Conditioners and HVAC Topics

Air conditioners are not just about the on/off button and remote control. For an engineer, they mean a lot more: they are machines that must be understood to achieve efficient performance.

### A Guide to Thermodynamics

One of the most fundamental science fields that has contributed to the evolution of engines since the early 19th century, thermodynamics has seriously affected our lives. In this guide we’ll start with the basics and move on to the more complicated principles and applications.

### Heat Exchanger Theory, Calculations, and Design

Calculations for heat exchanger designs use heat transfer parameters such as convection heat transfer coefficients, overall heat transfer coefficients, and log mean temperature differences. These calculations are needed for shell and tube and double pipe heat exchangers, as well as other types.

### Types of Projections for Designing Machines and Instruments

Projection is a method used to represent a 3-D object on a plane surface without including the mathematical calculations. It actually makes the study of design of an object or structure easier.

### Mechanical Workshop Safety Rules

Mechanical workshop safety rules are important to follow because workshop rules and regulations not only ensure worker safety but also bring efficiency to the work process. Safety guidelines, fire precautions, and general work rules ensure that a symmetrical work process is observed in workshops.

### Biomass Pellets - A More Portable And Flexible Fuel

Biomass has low bulk density, high moisture, and low energy density. Converting it to pellets makes it more portable and easily usable. Pelletization has advantages for both wood producers and power plant operations.

### Heat Resistant Materials for Home and Industrial Applications

Materials that have the ability to protect equipment and instruments from being damaged due to high temperature are called heat resistant materials. These materials can be found on the inside of ovens, in car parts, on the manufacturing floor of industrial buildings, etc.

### HVAC – Upgrades to Improve Efficiency

The power used in running a building’s Heating, Ventilation and Air Conditioning (HVAC) is quite substantial, so any measures to improve its efficiency will save energy and cash. An upgrade of the HVAC system can be carried out by replacing the old worn components with modern more efficient units.