HVAC: Heating, Ventilation & Air-Conditioning

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  • What is the Best Indoor Humidity Range for People, Books, and Electronics?
    This article provides an engineering perspective on the best range of humidity for people, books, and electronics. Also discussed is how humidity is measured and the best ways to control indoor humidity.
  • Learn More about Heat Pumps
    Nature created mankind, but with the advancement of technology, man is now trying to recreate nature. This may have its own advantages and disadvantages, but nowhere is this struggle more evident than in the field of environmental control for our inhabited interior spaces.
  • HVAC Design Principles and Major System Components
    Whether you're upgrading an existing system or building a new one, good knowledge of the principles of heating and air conditioning, and typical designs, will allow you to make wise decisions when the time comes. These principles, along with descriptions of typical components, are referenced here.
  • Air Conditioning from the Engineering Perspective: A Guide
    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.
  • Heat Exchanger Designs
    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.
  • An Elementary Introduction to Heat Capacity
    Why do you burn your tongue on the filling and not the crust when you bite into your favorite hot pie? The mystery is solved by examining heat capacity.
  • Preliminary Heat Exchanger Design Example
    Design of heat exchangers is an iterative process, using the heat exchanger design equation to estimate the needed heat transfer area, based on an estimate of the overall heat transfer coefficient, specified heat load, and log mean temperature difference (from inlet and outlet temperatures).
  • Installing a Through-Wall or Wall-Mounted Air Conditioner
    Wall mounted air conditioner units have advantages and disadvantages. In this article, we will talk about the installation and maintenance of wall mounted room air conditioners and their comparison with other popular types of air conditioning units.
  • The 2nd Law of Themodynamics
    In this article you will learn the two classical statements of second law, that is the Kelvin-Plank statement and Clausius statement. You will also learn some basics of thermodynamic entropy
  • How to Find Freon Leaks in Air Conditioners
    Freon leaks from air conditioners have adverse effects on our health. Keeping a check over Freon levels in air conditioners is important not only for health but for effective and smooth working of air conditioning units as well. Air conditioner leak detection is described in detail in this article.
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