Abstract: A cyclical salinity-gradient power generating system based on phase change materials and solar photothermal conversion is provided. The system comprises a solution supplying device, a power generating device and a power output device. The solution supplying device provides seawater with high and low concentration as salinity-gradient energy source of the power generating device; the power generating device implements day-and-night cyclical salinity-gradient power generation; the power output device stores electricity, part of which is used as providing power for the pumps inside the system and part of which is used as system output. A cyclical salinity-gradient power generating method based on phase change materials and solar photothermal conversion is also provided.

Abstract: A bearing comprises an outer casing and an inner casing, wherein each of the outer casing and the inner casing are shaped to hold a plurality of ball bearings to facilitate rotational movement of the outer casing with respect to the inner casing, and wherein the inner casing is shaped to define a circular void that is substantially empty except for structure as needed to hold the plurality of ball bearings against the outer casing, and wherein the outer casing is shaped to form a groove within which to receive a rail. A mounting system is included on the inner casing capable of receiving a mounting bracket to be slid longitudinally with respect to the rail upon the rotational movement of the outer casing.

Abstract: A bearing comprises an outer casing and an inner casing, wherein each of the outer casing and the inner casing are shaped to hold a plurality of ball bearings to facilitate rotational movement of the outer casing with respect to the inner casing, and wherein the inner casing is shaped to define a circular void that is substantially empty except for structure as needed to hold the plurality of ball bearings against the outer casing, and wherein the outer casing is shaped to form a groove within which to receive a rail. A mounting system is included on the inner casing capable of receiving a mounting bracket to be slid longitudinally with respect to the rail upon the rotational movement of the outer casing.