Copper is required in the heliostat field ( power cables, signal, earthing, motors ), receiver ( trace heating, signal cables ), storage system ( circulating pumps, cabling to consumption points ), electricity generation ( alternator, transformer ), steam cycle ( water pumps, condenser fans ), cabling to consumption points, control signal and sensors, and motors.
42.
Both steam cycles are rejected as the first motorcycle by other experts, such as " Cycle World "'s Technical Editor Kevin Cameron, who either argue that a true motorcycle must use a gasoline internal combustion engine, or that the first motorcycle must use the same technology as the successful motorcycles that later went into mass production, and not a'dead end '.
43.
The thermodynamic efficiency of this process has been improved over time; some older coal-fired power stations have thermal efficiencies in the vicinity of 25 % whereas the newest supercritical and " ultra-supercritical " steam cycle turbines, operating at temperatures over 600 �C and pressures over 27 MPa ( over 3900 psi ), can achieve thermal efficiencies in excess of 45 % ( LHV basis ) using anthracite fuel, or around 43 % ( LHV basis ) even when using lower-grade lignite fuel.
