Basic knowledge directory
Dewpoint During the warmer months, we can use the “Dew Point” as useful and interesting discomfort index. This particular weather element gives us an idea of how comfortable or uncomfortable we feel within the framework of hot and humid weather of the summer season. This information can be used at any time in our…
In the summer, humidity is the element that increases the feeling of embarrassment. RG Stedman (EE.UU.1979) developed the parameter windchill combined effect of heat and moisture from studies on human physiology and the heat transfer between the body, clothing and environment. When humidity is high, the wind chill value exceeds that of the air temperature.…
Wind chill As is known, the temperature of the outside air is not always a safe and reliable indicator to determine the cold that a person can feel, if exposed outdoors. There are other meteorological parameters influencing such as wind speed, radiation and humidity. The windchill term is used to describe the lower temperature that…
Temperature The temperature is a measure of the heat energy present in a substance, be it solid, liquid or gaseous.The heat, in turn, is energy that manifests as molecular vibration of a substance or as electromagnetic radiation. In simple terms we can say that heat is the phenomenon, while the temperature is a way to…
Dry bulb temperature The dry bulb temperature, or just dry temperature, air temperature measured without considering environmental factors such as radiation, humidity and air movement, which have the potential to significantly affect thermal sensation. One of the most used instruments for measuring the dry bulb temperature is the mercury thermometer, which consists of a thin…
Wet-Bulb temperature : Wet bulb temperature If we have to study evaporative cooling, psychrometry, thermodynamics, or just work in a place where there are cooling towers, the wet bulb temperature and dry bulb. Often confused and not clearly understand the concept. The wet bulb temperature is a temperature measurement type physical properties of a system…
Evaporative Cooling Types: 1. Evaporative Coolers: There is many names for this coolers (outdoor air coolers, Evaporative air coolers, swamp coolers or desert coolers) Wikipedia.org Direct Evaporative coolers (DEC) How it works: Main stream of air passing throw wet evaporative media Advantages: Low-cost, easy to maintain, hug amount of air flow, very low power consumption Disadvantages:…
What is evaporative cooling? is it phase-change cooling How evaporative cooling works: When warm air moves over water surface some water will start evaporation this action of transforming water to vapor will observe energy (the heat from the warm air) , this heat which taken from remaining amount of water in the liquid state, resulting in…
Evaporation: Evaporation, the process by which an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils; in particular, the process by which liquid water enters the atmosphere as water vapor. Evaporation, mostly from the sea and from vegetation, replenishes the humidity of the air. It is an important…
