Numerical aspect shows that Vortexes are formed at turning points inside the air heater, increasing heat exchange and pressure drop locally.
The pool boiling CHF of these pre-coated heaters increased by up to 35% with respect to that of the bare, sandblasted heaters.
We conclude that, when compared with exposure to flued gas heaters, classroom exposure to newer-style low-NOx unflued gas heaters increased respiratory symptoms, particularly in atopic children, but was not associated with measurable adverse changes in lung function.
The often lower efficiency of pellet heaters compared to oil or gas heaters increases the final energy demand.
Under the moderately fluctuating electricity price, the use of heaters increases the revenue significantly, compared to the same case with no electric heaters considered.
Results show that the energy consumption will be minimum if the pre-heaters increase the feed water temperature in such a way that their temperature difference is equal to that of effects.
The micro heater increases temperature to activate the sensing materials which react gases.
Using TES instead of a natural gas-fired heat transfer fluid heater (NG) increased total plant capital costs but decreased annual operation and maintenance costs.
After heating with 120 °C, the rock temperature at 0.3 m distance from the heater hole increased up to 50 °C over initial temperature.
Collection of samples at multiple point-of-use outlets in each building, in addition to water heater samples, increased detection of colonization within buildings.
