A system including: (i) a pumped-heat energy storage system (“PHES system”), wherein the PHES system is operable in a charge mode to convert electricity into stored thermal energy in a hot thermal storage (“HTS”) medium; (ii) an electric heater in thermal contact with the hot HTS medium, wherein the electric heater is operable to heat the hot HTS medium above a temperature achievable by transferring heat from a working fluid to a warm HTS medium in a thermodynamic cycle.

A control system for cost optimal operation of an energy facility including equipment covered by a maintenance contract includes equipment configured to operate during an optimization period and a controller. The controller modifies a cost function to include a maintenance cost term that defines a maintenance cost as a function of a rate variable and an equipment usage variable. The controller simulates a cost of operating the energy facility over the optimization period at each of a plurality of different values of the rate variable, selects a value of the rate variable that results in a lowest cost of operating the energy facility over the optimization period, performs an online optimization of the cost function with the rate variable set to the selected value to generate one or more setpoints for the equipment, and operates the equipment during the optimization period in accordance with the generated setpoints.

A control system for cost optimal operation of an energy facility including equipment covered by a maintenance contract includes equipment configured to operate during an optimization period and a controller. The controller modifies a cost function to include a maintenance cost term that defines a maintenance cost as a function of a rate variable and an equipment usage variable. The controller simulates a cost of operating the energy facility over the optimization period at each of a plurality of different values of the rate variable, selects a value of the rate variable that results in a lowest cost of operating the energy facility over the optimization period, performs an online optimization of the cost function with the rate variable set to the selected value to generate one or more setpoints for the equipment, and operates the equipment during the optimization period in accordance with the generated setpoints.

The single-working-medium vapor combined cycle is provided in this invitation and belongs to the field of energy and power technology. A single-working-medium vapor combined cycle method consisting of eleven processes which are conducted with M.sub.1 kg of working medium, M.sub.2 kg of working medium and H kg of working medium separately or jointly: a pressurization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption vaporization process 2-3 of the M.sub.1 kg of working medium, a pressurization process 1-e of the H kg of working medium, a mixed heat-absorption process e-6 of the (M.sub.1+M.sub.2) kg of working medium and the H kg of working medium, a pressurization process 6-3 of the M.sub.2 kg of working medium, a heat-absorption process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 4-5 of (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 5-f of the (M.sub.1+M.sub.2) kg of working medium, a mixed heat-releasing process f-6 of the (M.sub.1+M.sub.2) kg of working medium and the H kg of working medium, a depressurization process 6-7 of the (M.sub.1+H) kg of working medium, a heat-releasing and condensation process 7-1 of the (M.sub.1+H) kg of working medium.

A heat recovery system that includes at least one an engine, a radiator, an Organic Rankine Cycle (ORC) and a thermo-electric generator (TEG). The radiator may be coupled to the reciprocating engine, and the ORC may be coupled to the reciprocating engine and to the TEG. A control module in the system is configured to divert reciprocating engine jacket water fluid through any of the radiator, ORC and TEG to increase the energy efficiency of the reciprocating engine through heat recovery caused by the diverted fluid.

A heat recovery system that includes at least one an engine, a radiator, an Organic Rankine Cycle (ORC) and a thermo-electric generator (TEG). The radiator may be coupled to the reciprocating engine, and the ORC may be coupled to the reciprocating engine and to the TEG. A control module in the system is configured to divert reciprocating engine jacket water fluid through any of the radiator, ORC and TEG to increase the energy efficiency of the reciprocating engine through heat recovery caused by the diverted fluid.

The single-working-medium vapor combined cycle is provided in this invitation and belongs to the field of energy and power technology. A single-working-medium vapor combined cycle consists of eight processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: a pressurization process 1-2 of M.sub.1 kg of working medium, a heat-absorption and vaporization process 2-3 of M.sub.1 kg of working medium, a pressurization process 6-3 of M.sub.2 kg of working medium, a heat-absorption process 3-4 of M.sub.3 kg of working medium, a depressurization process 4-5 of M.sub.3 kg of working medium, a heat-releasing process 5-6 of M.sub.3 kg of working medium, a depressurization process 6-7 of M.sub.1 kg of working medium, and a heat-releasing and condensation process 7-1 of M.sub.1 kg of working medium; M.sub.3 is the sum of M.sub.1 and M.sub.2.

The combined cycle power device of the present invention belongs to the field of energy and power technology. A combined cycle power device comprises an expander, a compressor, the second expander, a pump, the second pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser and a mixed evaporator. A condenser connects a mixed evaporator. An expander connects the mixed evaporator. The mixed evaporator connects a compressor. The mixed evaporator passes through the second expander and connects the condenser. The compressor connects a high-temperature heat exchanger. A high-temperature evaporator connects the high-temperature heat exchanger after that the condenser passes through the second pump and connects the high-temperature evaporator. The high-temperature heat exchanger connects the expander. The high-temperature heat exchanger and the high-temperature evaporator have connect the outside respectively. The condenser connects the outside. The expander connects the compressor and transmits power.

The single-working-medium vapor combined cycle is provided in this invitation and belongs to the field of energy and power technology. A single-working-medium vapor combined cycle method consisting of thirteen processes which are conducted with M.sub.1 kg of working medium, M.sub.2 kg of working medium and H kg of working medium separately or jointly: performing a pressurization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption and vaporization process to set a state (2) to (3) of the M.sub.1 kg of working medium, performing a depressurization process to set a state (3) to (4) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (4) to (5) of the M.sub.1 kg of working medium, performing a pressurization process to set a state (1) to (e) of the H kg of working medium, performing a heat-absorption process to set a state (e) to (8) of the H kg of working medium, performing a pressurization process to set a state (8) to (5) of the M.sub.2 kg of working medium, performing a heat-absorption process to set a state (5) to (6) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (6) to (7) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set a state (7) to (f) of the (M.sub.1+M.sub.2) kg of working medium, performing a mixing heat-releasing process to set a state (f) to (8) of the (M.sub.1+M.sub.2) kg of working medium and H kg of working medium, performing a depressurization process to set a state (8) to (9) of the (M.sub.1+H) kg of working medium, performing a heat-releasing and condensation process to set a state (9) to (1) of the (M.sub.1+H) kg of working medium.

The single-working-medium vapor combined cycle is provided in this invitation and belongs to the field of energy and power technology. A single-working-medium vapor combined cycle method consisting of thirteen processes which are conducted with M.sub.1 kg of working medium, M.sub.2 kg of working medium and H kg of working medium separately or jointly: performing a pressurization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption and vaporization process to set a state (2) to (3) of the M.sub.1 kg of working medium, performing a depressurization process to set a state (3) to (4) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (4) to (5) of the M.sub.1 kg of working medium, performing a pressurization process to set a state (1) to (e) of the H kg of working medium, performing a heat-absorption process to set a state (e) to (8) of the H kg of working medium, performing a pressurization process to set a state (8) to (5) of the M.sub.2 kg of working medium, performing a heat-absorption process to set a state (5) to (6) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (6) to (7) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set a state (7) to (f) of the (M.sub.1+M.sub.2) kg of working medium, performing a mixing heat-releasing process to set a state (f) to (8) of the (M.sub.1+M.sub.2) kg of working medium and H kg of working medium, performing a depressurization process to set a state (8) to (9) of the (M.sub.1+H) kg of working medium, performing a heat-releasing and condensation process to set a state (9) to (1) of the (M.sub.1+H) kg of working medium.