Water by weight contained in 1 m3 of saturated water( C.A. Cavalli Termodinamica industriale – Hoepli) Tempearture in oC Contained water (grams of water vapor) g -10 2.15 0 4.89 10 9.54 20 17.7 30 31.7 40 55.1 50 94.20 60 160.36 70 282.97 Read More
Range of process plants that can be cooled with evaporative systems. Importance of volumes of energy to be disposed of. Cost-effectiveness of the cooling system. For high volumes of heat to be disposed, evaporative systems are much used for cooling water, relatively Read More
Up to what temperature can air cool water The refrigerator is the first thing that comes to mind when it comes to cooling. Refrigerating machines require a fair amount of energy to activate the process and transfer the heat from the element Read More
In the long cold winter evenings in Friuli, during my military service, I had lots of free time and with the help of my friend Pasquale I was eager to put together a diagram containing ten years of data temperatures from dozens of Read More
An industrial water cooling tower uses air from the environment as a cooling element. Until some time ago it was very difficult to find data values for temperature and humidity, simultaneously, needed to calculate the air enthalpy and to obtain significant design Read More
What to do when the maintenance manager warns that there’s something wrong with the cooling tower because it’s not functioning and not efficient and, as a consequence, the whole plant is not working because it’s stationary and/or blocked? The first thing is Read More
The amount of evaporated water in the surface portion dA can be expressed through the relationship: dL = kv (psat – pv) dA, where kv is the evaporation function index. The following expression describes the amount of heat (QD) removed from water during evaporation: dQD = Read More
EVAPORATION OF FLUID INTO GAS The following discussion is based on the following assumptions: (1) Inside the water there is no heat exchange; (2) The water that has decreased in volume, due to the evaporation effect, will be replenished with the same Read More
SYSTEMS THAT COOL WATER IN AN EVAPORATIVE WAY: WHERE THEY ARE USED A hint is given by knowing how refrigerators function in terms of “transfer of energy-heat”. Although this topic is very interesting, we will not linger on the quality of energy. We Read More
COOLING WATER The concept of temperature and heat Temperature is a physical quantity that expresses the thermal state of an object. It is closely correlated to the amount of heat contained in the object itself. A hot body is characterized by the Read More
