Definition. Hypocalcemia, a low bood calcium level, occurs when the concentration of free calcium ions in the blood falls below 4.0 mg/dL (dL = one tenth of a liter). The normal concentration of free calcium ions in the blood serum is 4.0-6.0 mg/dL.
(Redirected from Heat cycle) A thermodynamic cycle consists of a linked sequence of thermodynamic processes that involve transfer of heat and work into and out of the system, while varying pressure, temperature, and other state variables within the system, and that eventually returns the system to its initial state.
These include steam. cycles, combined steam- and gas-turbine cycles (systems where the hot exhaust gases are. delivered to a heat-recovery steam generator to produce steam that is used to drive a. steam turbine), and a number of advanced technology processes such as fuel cells (i.e.,