The term subcooling (also called undercooling) refers to a liquid existing at a temperature below its normal boiling point. For example, water boils at 373 K; at room temperature (293 K) liquid water is termed "subcooled". Subcooled liquids are frequently used in refrigeration cycles, steam turbine cycles, and some rocket engines use subcooled propellants.
In refrigeration systems, a subcooled liquid is the convenient state in which refrigerants may undergo the remaining stages of a refrigeration cycle.[1] Normally, a refrigeration system has a subcooling stage, allowing technicians to be certain that the quality, in which the refrigerant reaches the next step on the cycle, is the desired one. Subcooling may take place in heat exchangers and outside them. Being both similar and inverse processes, subcooling and superheating are important to determine stability and well-functioning of a refrigeration system.[2]
^Ibrahim Dinçer, Refrigeration Systems and Applications. John Wiley & Sons, Second Edition, 2010, pp. 169-170. [1]
^Emerson Climate Technologies, Factors to Consider in Converting Compressor Rated Capacity in Actual Capacity. December 2002, Page 1. [2] Archived 2018-10-19 at the Wayback Machine
the desired one. Subcooling may take place in heat exchangers and outside them. Being both similar and inverse processes, subcooling and superheating...
to be set-up as a booster with subcooling, if the refrigerant arriving at the interstage passes through a subcooling heat exchanger that subcools the...
required for the subcooling leads to the superheating of the vapor drawn into the compressor. When the increase in cooling achieved by subcooling is greater...
molecular structure) List of gases including boiling points Melting point Subcooling Superheating Trouton's constant relating latent heat to boiling point...
pressurizer temperature is maintained at 345 °C (653 °F), which gives a subcooling margin (the difference between the pressurizer temperature and the highest...
engine to power a vehicle in flight. Raptor is powered by subcooled liquid methane and subcooled liquid oxygen in a full-flow staged combustion (FFSC) cycle...
advantage of the denser propellants achieved by subcooling. Merlin 1D vacuum thrust increased by subcooling the propellants. several small mass-reduction...
explains why superheated liquids can exist above their boiling point and subcooled vapors can exist below their condensation point. The graph on the right...
its flagship rocket featuring increased performance, notably thanks to subcooling of the propellants. After launching a constellation of 11 Orbcomm-OG2...
coefficient in boiling. The Thom correlation is for the flow of boiling water (subcooled or saturated at pressures up to about 20 MPa) under conditions where the...
the subcooled surface, and usually occurs when the liquid wets the surface. Dropwise condensation is when liquid drops are formed on the subcooled surface...
∫ C T C d s {\displaystyle W_{N}=\int _{H}T_{H}ds-\int _{C}T_{C}ds\,} Subcooled liquid enters the evaporator. Due to the heat exchange with warm sea water...
channels open for diffusion. Amorphous solid Pumpable ice technology Subcooling Ultracold atom Viscous liquid Freezing rain Gomes, Gabriel O.; H. Stanley...
compressors.[how?][dubious – discuss] It is also used in the LNG industry for subcooling LNG using power from a gas turbine to drive the compressor.[dubious –...
transfer in the presence of gas bubbles on the heating surface (e.g., in subcooled nucleate boiling) has long been ignored, but it is currently a topic of...
A compressed fluid (also called a compressed or unsaturated liquid, subcooled fluid or liquid) is a fluid under mechanical or thermodynamic conditions...
Hamaguchi, Imagawa, Obana, Yanagi and Mito (2018). "Operations of the Helium Subcooling System for the LHD HelicalCoils during Ten Plasma Experimental Campaigns"...
dissipation device) where it condenses from a hot gas into a liquid, typically subcooled at the exit of the condenser then the liquid is fed to an expansion device...
is so named because after emerging from the condenser (possibly as a subcooled liquid) the working fluid is heated by steam tapped from the hot portion...
currently under development, is a high pressure gas generator cycle LOX/subcooled Methane propellants engine designed to produce 258,000 lbf (1,150 kN)...
first stage was upgraded with a larger liquid oxygen tank, loaded with subcooled propellants to allow a greater mass of fuel in the same tank volume. The...
such as closed ends, high points or knees (changes in pipe slope). When subcooled liquid flows into the space previously occupied by vapor the area of contact...
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