Temperature Conversion

At first it was defined by the freezing point of water (and the melting point of the later ice), but now the Celsius temperature is officially a differential scale as defined in the Kelvin temperature scale.

Celsius scale zero (0 ° C) is defined as corresponding to 273.15 K, temperature difference of 1 ° C corresponds to 1 ° C. That is, the scale of each scale is the same. This means 100 ° C, which was previously defined as the boiling point of water, and it is now defined as corresponding to 373.15 K

Celsius is an interval system, but it is not a ratio system. That is, it follows the relative ratio, but does not obey the absolute ratio. Since the temperature interval between 20 ° C. and 30 ° C. is the same between 30 ° C. and 40 ° C., it can be seen that 40 ° C. does not have twice as much air heat energy as 20 ° C.

Fahrenheit is a thermodynamic temperature scale of 32 degrees Fahrenheit degrees (degrees Fahrenheit) of water, boiling point 212 degrees F (under normal atmospheric pressure). This separates the boiling point and freezing point of water exactly 180 degrees. Therefore, Fahrenheit degree is 1/180 of the interval between freezing point and water's boiling point. The absolute zero is defined as -459.67 ° F

Based on the definition of the Celsius scale and experimental evidence of absolute zero degree -273.15 ° C

Ocean thermal energy converts the sea surface temperature to 20 - 30 ° C and the depth to 4 - 6 to 800 - 1000 m. These temperature differences are used to rotate the turbine to generate electricity. High-boiling ammonia is used as the working fluid. An appropriate temperature difference between the power generation was found in the 40 ° N to 40 ° S waters including Japan's exclusive economic zone. The tide current flood gate is installed in a wide tide range (near the mouth of the mouth). The flood gate is closed at high tide to protect the seawater in the bay. Then, we will use the sea water rotary mill to generate electricity using the tide area generated by the tide. Constructed in the estuary of the Rance River in France in 1967, the world's largest 240,000 kW tidal power generator

The ocean supplies a great deal of energy, such as waves, tides, salinity differences, seawater temperature differences. You can use these energy to generate electricity. "Green" marine energy forms include tidal energy, ocean current energy, penetration, ocean heat, wave energy. The tidal power sometimes uses the generator to generate power from the tide current by storing the seawater and then using the dam to release. The Lance Dam, 1 km (0.62 mile) in length, is near Saint-Malo in Brittany and opened in 1967, but it produced approximately 0.5 GW, but there were few similar solutions to it. (Pp 111-112)

Low temperature thermal desalination (LTTD), which was derived from the study of ocean thermal energy conversion originally uses low pressure water boiling even at ambient temperature. This system uses a pump to create a low pressure, low temperature environment where water boils between two volumes of water at a temperature gradient of 8 to 10 ° C (46 to 50 ° F). The supply of cold seawater can reach up to 600 meters (2,000 feet) deep. These pumps are pumped through the coil to condense the water vapor. The resulting condensate is purified water. LTTD can use the thermal gradient available at the power plant to remove large amounts of warm wastewater from the plant and reduce the energy input required to generate a temperature gradient.