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Heat capacity rate information


The heat capacity rate is heat transfer terminology used in thermodynamics and different forms of engineering denoting the quantity of heat a flowing fluid of a certain mass flow rate is able to absorb or release per unit temperature change per unit time.[1][2][3] It is typically denoted as C, listed from empirical data experimentally determined in various reference works, and is typically stated as a comparison between a hot and a cold fluid, Ch and Cc either graphically, or as a linearized equation. It is an important quantity in heat exchanger technology common to either heating or cooling systems and needs, and the solution of many real world problems such as the design of disparate items as different as a microprocessor and an internal combustion engine.

  1. ^ Cengel, Yunus; Boles, Michael (2014-01-07). Thermodynamics: An Engineering Approach (8th ed.). New York, NY: McGraw-Hill Education. ISBN 978-0-07-339817-4.
  2. ^ Moran, Michael J.; Shapiro, Howard N.; Munson, Bruce R.; DeWitt, David P. (2002-09-17). Introduction to Thermal Systems Engineering: Thermodynamics, Fluid Mechanics, and Heat Transfer (8/18/02 ed.). Chichester: Wiley. ISBN 978-0-471-20490-9.
  3. ^ Bergman, Theodore L.; Lavine, Adrienne S.; Incropera, Frank P.; DeWitt, David P. (2011-04-12). Fundamentals of Heat and Mass Transfer (7th ed.). Hoboken, NJ: Wiley. ISBN 978-0-470-50197-9.

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Heat capacity rate

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NTU method

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number of transfer units (NTU) method is used to calculate the rate of heat transfer in heat exchangers (especially parallel flow, counter current, and cross-flow...

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Cooling capacity

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the cooling capacity [kW] m ˙ {\displaystyle {\dot {m}}} is the mass rate [kg/s] C p {\displaystyle C_{p}} is the specific heat capacity [kJ/kg K] Δ T...

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Capacity

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Heat

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be written with the dot notation) since heat is not a function of state. Heat flux is defined as rate of heat transfer per unit cross-sectional area (watts...

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calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. Differential scanning calorimeters, isothermal...

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Thermal diffusivity

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In heat transfer analysis, thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. It is a...

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Heat equation

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factor called the specific heat capacity of the material. By the combination of these observations, the heat equation says the rate u ˙ {\displaystyle {\dot...

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{\displaystyle \phi _{q}} is heat flux (W/m2), ρ {\displaystyle \rho } is density (kg/m3), c p {\displaystyle c_{p}} is heat capacity at constant pressure (J/kg·K)...

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Thermal energy storage

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heat. A disadvantage of SHS is its dependence on the properties of the storage medium. Storage capacities are limited by the specific heat capacity of...

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electricity. Electric current flowing through conductors heats them. If heat is produced at a sufficient rate, the conductor temperature rises and the insulation...

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Differential scanning calorimetry

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technique are the ultrahigh scanning rate, which can be as high as 106 K/s, and the ultrahigh sensitivity, with a heat capacity resolution typically better than...

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nameplate rated capacity in only one hour. Typically, maximum capacity is found at a low C-rate, and charging or discharging at a higher C-rate reduces...

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to describe the heat-extraction capacity of refrigeration and air conditioning equipment. It was originally defined as the rate of heat transfer that results...

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process by which heat is transferred from the hotter end to the colder end of an object. The ability of the object to conduct heat is known as its thermal...

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is needed, but capacity factors tend to be low (around 20%) since the heat is mostly needed in the winter. Even cold ground contains heat: below 6 metres...

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Volumetric flow rate

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respectively, to distinguish from the notation Q {\displaystyle Q} for heat. Volumetric flow rate can also be defined by Q = v ⋅ A , {\displaystyle Q=\mathbf {v}...

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The Heat Capacity Mapping Mission (HCMM) spacecraft was the first of a series of Applications Explorer Mission (AEM) of the Explorer program. The objective...

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