reheating


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reheating

[rē′hēd·iŋ]
(astronomy)
A scenario suggested by the original calculations of the inflationary universe cosmology in which, following inflation, the universe quickly thermalizes to a temperature that is comparable to the energy density stored in the original symmetric pre-inflationary phase of matter.
(thermodynamics)
A process in which the gas or steam is reheated after a partial isentropic expansion to reduce moisture content. Also known as resuperheating.

Reheating

The addition of heat to steam of reduced pressure after the steam has given up some of its energy by expansion through the high-pressure stages of a turbine. The reheater tube banks are arranged within the setting of the steam-generating unit in such relation to the gas flow that the steam is restored to a high temperature. Under suitable conditions of initially high steam pressure and superheat, one or two stages of reheat can be advantageously employed to improve thermodynamic efficiency of the cycle. See Steam-generating unit, Steam turbine, Vapor cycle

reheating

In an air-conditioning system, the heating of air which has already been conditioned, e.g., the heating of air supplied to one zone of the system in order to maintain temperature control in that zone.
References in periodicals archive ?
Natural gas can be a low cost alternate source of energy for ladle preheating and molten steel reheating, he said
According to the authors, "This technology is a low capital cost alternative to electrically powered reheating facilities which is appropriate for foundry use.
Whether you're microwaving leftovers or reheating them in the oven, the only accurate way to gauge the doneness of food is to use a meat thermometer to make sure foods reach a safe internal temperature of 165 degrees Fahrenheit.
They are reheating a lot of takeout food from delis and supermarkets, which have microwave directions.
Praxair has received over 275 patents for steel-making technologies using industrial gases in innovative, money-saving ways, including technologies for burners, ladles, melting, refining, and reheating.
There is no cooling or reheating between the preforming and blowing stages.
The NSR method involves reheating the preforms in a temperature-controlled water bath and blowing them without a mold so that they are free to expand without restriction.
This modernization will basically be a doubling of the existing plant's melting and casting capability, constructed adjacent to the existing Melt Shop Facility which will include a new 135-metric ton electric arc furnace shop with ladle furnace, a new thin slab casting machine, and a new tunnel reheating furnace with a new slab transfer car to feed the existing hot strip mill.
The 6/10 rotary has a special 10-module reheating oven (the standard 6/6 machine has six modules), which provides greater latitude for processing thick preforms for hot filling, Sidel says.
To effect these changes, a new walking beam reheating furnace and a Morgan housingless stand breakdown mill will be installed.
Praxair estimates the use of oxy-fuel burners for steel reheating would increase oxygen consumption by at least 50 percent for most blast furnace-based steel producers.