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Entries with tag temperature and humidity control .

Humidification in clean rooms

The processes that take place inside a clean room are considerably influenced by the thermodynamics of the air . In the article “ Clean rooms: why is air quality essential? ”, we looked at how the air handling unit and its control system are crucial in guaranteeing a high quality process. Humidification plays a primary role in controlled-contamination environments , where the...
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Lotuses and Artefacts - Hangzhou, China, 23-24 August 2018

Hangzhou is a pleasant city with a population of around 9 million (2015), located in the Chinese Province of Zhejiang, approximately 1 hour by train south of Shanghai. It is located near the end of the Grand Canal , the oldest and longest man-made waterway in the world, built to connect Beijing with Ningbo, on the eastern coast, and support commerce to and from the capital;...
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Clean rooms: why is air quality essential?

The constant increase in the technological level of production processes (in particular in the electronics industry) and the increasingly stringent regulations on hygiene and quality (chemical and pharmaceutical industries) have led to the growing use of controlled-contamination environments . These are areas with specific air requirements in terms of “ contaminant presence ”, so as to...
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Heat recovery ventilation and humidification: the new horizon in comfort

Heat recovery ventilation (HRV) systems are today becoming more and more important in the commercial and residential ventilation sector. These systems involve very compact air handling units, equipped with heat recovery, which introduce a stream of fresh air from the outside into the air-conditioned environment, while at the same time discharging the exhaust air. The heat exchanger,...
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Kigali, energy efficiency and control schemes - 2nd part

The Kigali amendment to the Montreal Protocol was signed on 16 October 2016, with the intention of phasing out HFCs, being contributors to global warming. Interestingly, a request to “the Technology and Economic Assessment Panel 1 to review energy efficiency opportunities in the refrigeration and air-conditioning and heat-pump sectors related to a transition to climate-friendly...
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Kigali, energy efficiency and control schemes - 1st part

The Kigali amendment to the Montreal Protocol was signed on 16 October 2016, with the intention of phasing out HFCs, being contributors to global warming. Interestingly, a request to “the Technology and Economic Assessment Panel 1 to review energy efficiency opportunities in the refrigeration and air-conditioning and heat-pump sectors related to a transition to climate-friendly...
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2018 ASHRAE Winter Conference in Chicago

  Humidification: renewed interest! Refrigerants: feeling the “natural” pressure?   The ASHRAE Winter Conference was held on 20-24 January 2018, during some mild winter weather (incredibly for Chicago, just around freezing!). Like all ASHRAE Conferences, the event was attended by several thousand people, who asked questions, learned and profitably networked during the...
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We will fog you!

You know that chill you feel on your face on a foggy day? Well, it’s caused by the heat released by your body to the small airborne droplets of moisture that touch your skin and evaporate. This is evaporative cooling. Evaporative cooling exploits the natural evaporation of water to provide cooling. Water naturally evaporates into vapour as long as the air it is in contact...
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Generation Z: vision and hopes (vs. the establishment’s)

Any parent knows that kids want to get what they wish for now, and in the form and shape they like, and without wasting energy and time to get it and enjoy it , and, and, … This is typical of youth, when parents begin to slowly ‘unleash’ their kids, and they feel that the much-awaited freedom of realising their dreams, or at least of trying to, is within arms’ reach, aiming to live...
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Relative humidity and printability

The printing industry features a multitude of different technologies that can be used, from traditional printing (such as offset printing, rotogravure printing, screen printing, etc.) to digital printing (for example, inkjet or laser).  The processes underlying these technologies are quite different, but they all share one need: to control humidity in the processing and storage...
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