Sep
18
2018

History of Ice Machines

The first ever patent for an Ice Machine was granted to John Gorrie in 1851 after he had perfected his 1842 invention of a system that was able to chill water to produce ice. However, his plan to manufacture the machine for the general public was thwarted by a smear campaign led by Frederic Tudor, and the death of his partner. He died four years later in 1855, humiliated and financially ruined. He lays buried in Apalachicola, at Gorrie Square, and his original machine and plans are held at the Smithsonian Institution, Washington, D.C. Alexander Twining also received a patent for an Ice Making Machine in 1853. His experiments led to the first commercial refrigeration system in the USA (1856) and he also established the first practical method for bulk producing ice by artificial means. Professor Jürgen Hans also experimented with ice creation and in 1929 he successfully developed a machine that was capable of making ice that was edible. H […]

Aug
29
2018

Making the Case for CO2 Refrigeration in Warm Climates

  For a decade or more, the potential of CO2 in supermarket refrigeration has been recognized in Northern Europe. Thanks to its unique properties, notably the high heat transfer coefficients and the low sensitivity to pressure losses, CO2 delivers high performance in supermarket applications.   In warmer climates, the advantages of CO2 in food retail applications have been disputed. In recent years, however, the interest from forward-thinking retailers has fueled the invention of new technologies that make transcritical CO2 systems in warmer climates both viable and profitable. New technologies are rapidly emerging as highly energy-efficient solutions that help retailers reduce complexity and meet current and future regulation on traditional refrigerants. In this article, we will explore the pros and cons of different solutions for CO2 refrigeration in warmer climates – from basic cascade systems to the advanced ejector techno […]

Aug
13
2018

Advantages and Disadvantages of Each Compressor Type

Advantages and disadvantages of any compressor are based on its characteristics and application. Advantages and disadvantages listed below are for a typical compressed air system in an industrial plant. The estimated full‐load bhp requirement of each compressor type at 100 psig discharge pressure at the compressor, a main drive motor typical efficiency of 92 percent and 0.746 kilowatts (kW)/bhp, the approximate operating costs of operation are obtained. Single‐Acting, Air‐Cooled Reciprocating Air Compressors Advantages include Small size and weight Generally, can be located close to point‐of‐use avoiding lengthy piping runs and pressure drops Do not require separate cooling systems Simple maintenance procedures. Disadvantages include: Lubricant carryover as piston rings wear, which should be avoided Relatively high noise Relatively high cost of compression Generally, are designed to run not more than 50 percent of the time, although som […]

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