Refrigeration System Components and Installation Practices
The star of the freezer means * = -6 ºC.
Refrigeration System Components
Evaporators
- Types: Visible or buried.
- Temperature Conservation: Limited space and evaporator size.
- Apparatus Combination: Network hose and multiple computers (e.g., 2 evaporators, 2 tabs).
- Single Computer Evaporator: More coils for the freezer, less cooling capacity.
- Circuit Perimeter: Extended around doorways to prevent frost (highest leak potential).
- Loop: Circulates oil from the crankcase for cooling.
The vacuum is up to 30 inches.
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Electrical Current
Current, or electric current, is the flow of electric charge through a material over time. This flow is due to the movement of electrons within the material. Current is measured in amperes (A), which represents coulombs per second (C/s) in the International System of Units. Electric current generates a magnetic field, a principle used in electromagnets. Current intensity is measured using a galvanometer, calibrated in amperes and called an ammeter, placed in series with the conductor.
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Heat, Work, and the First Law of Thermodynamics
Summary
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Dispersion of Light
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Interference
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Temperature:
Concept: Temperature is the observable manifestation of the kinetic energy of molecules. It measures the thermal state of a body. The greater the kinetic energy of molecules, the higher the temperature.
Effects: Expansion of a body, changes in electrical resistance or pressure.
Thermometers:
A thermometer is a device used to measure temperature. It functions on the principle of thermal equilibrium, meaning the thermometer reaches the same temperature as the object it contacts.
Clinical thermometers
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