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 […]

You’ve probably seen calculators with solar cells — devices that never need batteries and in some cases, don’t even have an off button. As long as there’s enough light, they seem to work forever. You may also have seen larger solar panels, perhaps on emergency road signs, call boxes, buoys and even in parking lots to power the lights. Although these larger panels aren’t as common as solar-powered calculators, they’re out there and not that hard to spot if you know where to look. In fact, photovoltaics — which were once used almost exclusively in space, powering satellites’ electrical systems as far back as 1958 — are being used more and more in less exotic ways. The technology continues to pop up in new devices all the time, from sunglasses to electric vehicle charging stations. The hope for a “solar revolution” has been floating around for decades — the idea that o […]

In the 1800s natural refrigeration was a vibrant part of the economy. Natural ice harvested from the pristine rivers and lakes of the northern United States, particularly those in New England, was in demand. Harvested ice was stored in large quantities in ice houses and covered with sawdust for insulation. Later, merchants loaded the ice in sailing ships as ballast. Again, the ice was covered with sawdust. Ice was delivered to as far away as India, where it was welcomed, and to England, where interest was low. The supply of harvested ice was erratic, depending on the weather where it was harvested. During the 1800s many mechanical-type refrigeration systems were being invented and used refrigerants such as sulfur dioxide, methyl chloride, ether, carbon dioxide, as well as wine, brandy, vinegar, etc. The early refrigeration systems designed between 1850 and 1920 produced ice year-round to compete with harvested ice. The harvested ice pro […]

Industry trade associations and professional bodies from across the globe have come together to establish June 26 as World Refrigeration Day, which will be celebrated the world over as an annual event. The entire worldwide industry is encouraged to take the opportunity to promote the significant role of refrigeration, air conditioning and heat pumps in the well-being of mankind. It is intended that World Refrigeration Day will serve as a means of raising awareness and understanding to the general public of the significant role that the industry and its technology play in modern life and society, with RACHP and HVACR organizations and professionals around the world undertaking a range of activities. The term ‘refrigeration’ here is being used in its widest sense as the process of achieving and maintaining a required temperature below that of its surroundings. An example of refrigeration is the preservation and distribution of perishable […]

Magnetic cooling is a promising new refrigeration technology boasting several advantages – ranging from lower energy consumption to eliminating the use of hazardous fluids – that combine to make it a much more environmentally friendly option than today’s standard fluid-compression form of refrigeration. One novel magnetic cooling approach, developed by a team of Canadian-Bulgarian researchers, relies on solid magnetic substances called magnetocaloric materials to act as the refrigerant in miniaturized magnetic refrigerators. As the team describes in the journal Applied Physics Letters, from AIP Publishing, these materials are the key to the development of a “green” cooling technology whose efficiency is able to scale directly with the generated magnetocaloric effect. The magnetocaloric effect is “the thermal response of a magnetic material to the change of an external magnetic field, which manifests as a change i […]

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Focusun would like to wish all our customers around the world a Happy and blessing Eid El-Fitr. Eid Mubarak

According to a new report from Zion Market Research, global demand for commercial refrigeration equipment was valued at USD 36.63 billion in 2015 and is expected to generate revenue of $61 billion by the end of 2021, up from a value of $36.6 billion in 2015 for a compound annual growth rate of slightly above 9.0 percent between 2016 and 2021. Commercial refrigeration equipment in the report is defined as equipment used for refrigeration in food and beverage industry, for food storage and merchandising purposes by the food wholesale industry, such as supermarkets, specialty food stores, grocery stores, and convenience stores. A commercial refrigerator is a free-standing part of the equipment that gives cold storage for a commercial kitchen. Some of the different types of commercial refrigeration include reach-in refrigerators and freezers, walk-in refrigerators and freezers, under counter refrigerators, refrigerated merchandisers, bar re […]

Focusun would like to wish all the Muslims around the world a happy and blessed Ramadan As you fast and offers prayers to Allah, may you find your peace and happiness. Ramadan Kareem

A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of a gas. Liquids are relatively incompressible; while some can be compressed, the main action of a pump is to pressurize and transport liquids. Types of compressors The main and important types of gas compressors are illustrated and discussed below:   Positive displacement Positive displacement compressor means a system which compresses the air by the displacement of a mechanical linkage reducing the volume (since the reduction in volume due to a piston in thermodynamics is considered as the positive displacement of the piston).   Reciprocating compressors Reciprocating compressors use pistons driven b […]