# thermal capacity

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## heat capacity

heat capacity or thermal capacity, ratio of the change in heat energy of a unit mass of a substance to the change in temperature of the substance; like its melting point or boiling point, the heat capacity is a characteristic of a substance. The measurement of heat and heat capacity is called calorimetry. In the metric system, heat capacity is often expressed in units of calories per gram per degree Celsius (cal/g-℃); in the English system, British thermal units per pound per degree Fahrenheit (Btu/lb-℉) are often used. Because of the definitions of the calorie and Btu, these two heat capacity units are equivalent; the heat capacity of pure water is 1 cal/g-℃ and 1 Btu/lb-℉. Other units are used also; for example, the heat capacity of pure water is 4.184 joules/g-℃ and 1.16x10−6 kilowatt-hours/g-℃. The heat capacity of a system such as a calorimeter refers to the ratio of the change in heat energy of the system as a whole to the change in its temperature and is expressed in such units as calories per degree Celsius. See also specific heat.

## thermal capacity

[′thər·məl kə′pas·əd·ē]
(thermodynamics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## heat capacity, thermal capacity

The amount of heat necessary to raise the temperature of a given mass by 1 degree; numerically equal to the mass multiplied by the specific heat.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The slowdown in new thermal capacity addition by the state and central thermal sectors will also support the absorption of excess thermal capacity over this period.
Notably, E.ON reported its biggest-ever annual loss in early 2016 after it was forced to accept impairments on thermal capacity (mostly gas) of EUR8.8bn for full year 2015.
AtriCure said that the cryoFORM probe builds off of the company's core strengths in cryoablation technology, leveraging such important features as thermal capacity to remove heat and active defrost, which offers the increased probe flexibility necessary for minimally invasive cardiac surgeries.
In order to ensure a predetermined hot water consumption when i-th mode of consumption [G.sub.i] the OET required thermal capacity is
Designed for reliable operation in harsh or remote environments where cooling water is not available, the XO's unique design provides high thermal capacity, eliminating the need for cooling water in extreme heat conditions.
In addition to increasing the magnetic power of the devices, the application of the nanostructures synthesized in this research increases the thermal capacity of the device and causes the LED plates to become warm with delay.
The future is even brighter, anticipating that the world solar thermal capacity in the building sector could reach 3740 GWth in 2050.
The fluid has a density of [rho] = 1015 kg/[m.sup.3](63.4 lb/[ft.sup.3]) and a thermal capacity of [c.sub.p] = 3.97kJ/kg x K (0.948 Btu/lb x [degrees]F).
The device will also learn how to work with the thermal capacity of the unit and remaining power supply.
With this unit, Reliance Power's generation capacity increased to 3,205 MW which includes 3,120 MW of thermal capacity and 85 MW of renewable energy based capacity.

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