This maximum amount is called the water vapor saturation pressure. At any temperature, there is a maximum amount of water vapor that the air can hold. Quality Air Critical to Production and Productsĭew point is simply the temperature to which air must be cooled for the water vapor within to condense into dew or frost. What follows is a review of dew point and methods for measuring it with compressed air systems.ĭew point measurement ensures energy efficiency and helps lower the cost of ownership of compressed air systems. For compressed air systems, nothing offers a better return on investment than dew point measurement for ensuring energy efficiency and lowering the cost of ownership. Compressed air is one of the largest consumers of energy, which accounts for approximately 75% of the lifetime cost of a compressed air system.įortunately, energy saving opportunities are also everywhere, it just takes a little effort to recognize them. Think of it like electricity – a power source that drives conveyers, packaging lines, spray-painting equipment, metal presses – the list goes on and on. So it all depends on what your body is accustomed to experiencing each year.In industry, compressed air is everywhere. In contrast, Sistek said that in the tropical climate of Florida, dew points in the low 60s during the summer are likely a cause for celebration since much of the season has dew points in the 70s there. Thus, on the few occasions they reach that level, Seattle residents surely note the very muggy conditions." "It's a rare occasion when dew points climb into the low 60s, with mid-60s nearly unheard of. "Dew points in the Seattle area typically hover in the 40s or 50s in the summer due to our proximity to the cool waters of the Pacific Ocean," said FOX Weather meteorologist Scott Sistek, a resident of the Pacific Northwest. However, these comfort and discomfort levels can vary by region because people who live in the very humid climates of the southern United States might be able to tolerate dew points in the 60s far better than those who live in the much drier climates of the northern U.S. ‘CORN SWEAT’ IN THE MIDWEST CAN CAUSE SOME OF THE MOST OPPRESSIVE HUMIDITY IN THE U.S. On rarer occasions, dew points can even get into the 80s, mainly along the Gulf Coast or in the corn-covered Upper Midwest that’s essentially unbearable to just about anyone. Weather conditions affect everyone differently, but a good generalization is that dew points in the 50s or lower are comfortable for most people, the 60s are humid and somewhat uncomfortable and the 70s are oppressive and very uncomfortable. This table illustrates how muggy the air feels at various ranges of dew points. You’re probably not going to break a sweat at 20 degrees, even with 100% relative humidity. This is why relative humidity is practically useless when trying to determine how humid the air is outside. WHAT IS THE HEAT INDEX AND WHY IS IT IMPORTANT TO YOUR HEALTH? In general, once the dew point exceeds 60 degrees, there’s a lot of water vapor in the air, which is what gives the air that muggy feel.Īt 60% relative humidity with a temperature of 80 degrees and a dew point of 65 degrees, you’re probably going to break a sweat while doing anything strenuous – even at night or on a cloudy day – because dew points in the mid-60s are indicative of a muggy air mass. That’s indicative of a bone-dry air mass even though the relative humidity says otherwise. Using the 100% relative humidity example at an air temperature of 20 degrees, that would mean the dew point is also 20 degrees. This chart illustrates the key differences between relative humidity and dew point.
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