Systems and methods for generating electrical power in an organic Rankine cycle (ORC) operation include one or more heat exchangers incorporated into mobile heat generation units, and which will receive a heated fluid flow from one or more heat sources, and transfer heat therefrom to a working fluid that is circulated through an ORC unit for generation of power. In embodiments, the mobile heat generation units comprise pre-packaged modules with one or more heat exchangers connected to a pump of a recirculation system, including an array of piping, such that each mobile heat generation unit can be transported to the site and installed as a substantially stand-alone module or heat generation assembly.

A cooling arrangement for a WHR-system in a vehicle, includes a first cooling circuit including a first radiator (9) in which a circulating coolant is cooled, and a second cooling circuit including a second radiator (14) in which a coolant is cooled to a lower temperature than the coolant in the first radiator (9). A condenser inlet line (17, 38) directs coolant from one of the cooling circuits to a condenser (19) of the WHR-system, and a cooling adjusting device (13, 16, 24, 38) for adjusting the temperature of the coolant in the inlet line (17, 38) to the condenser (19) by the coolant in the other cooling circuit. An arrangement (37, 24) receives information about the cooling to estimates cooling for the working medium in the condenser (19) controls the adjusting arrangement (13, 16, 24, 38) such that the coolant in the condenser inlet line (17) provides the estimated suitable cooling of the working medium in the condenser (19).

A cooling arrangement for a WHR-system in a vehicle, includes a first cooling circuit including a first radiator (9) in which a circulating coolant is cooled, and a second cooling circuit including a second radiator (14) in which a coolant is cooled to a lower temperature than the coolant in the first radiator (9). A condenser inlet line (17, 38) directs coolant from one of the cooling circuits to a condenser (19) of the WHR-system, and a cooling adjusting device (13, 16, 24, 38) for adjusting the temperature of the coolant in the inlet line (17, 38) to the condenser (19) by the coolant in the other cooling circuit. An arrangement (37, 24) receives information about the cooling to estimates cooling for the working medium in the condenser (19) controls the adjusting arrangement (13, 16, 24, 38) such that the coolant in the condenser inlet line (17) provides the estimated suitable cooling of the working medium in the condenser (19).

A boiler unit comprises an enclosure including: a first circuit of a first fluid heat exchange medium, the first circuit having a heating device to heat the first medium, a boost heat exchanger, a valve and a first manifold; a second circuit of a second heating system fluid heat exchange medium, the second circuit having a flow and return port of the boiler unit, a second manifold and said boost heat exchanger for exchange of heat between said first and second heat exchanger media when said valve is open; a space in the enclosure receiving an auxiliary unit to be driven substantially exclusively by said first fluid heat exchange medium; and a boiler control unit to control operation of the heating device according to heat demand of the heating device and otherwise irrespective of the auxiliary unit when connected; and an organic rankine cycle (ORC) unit comprising: a third fluid heat exchange medium circuit, the circuit including a condenser adapted for connection to said second manifold to provide heat to said second circuit, a pump to circulate said third medium, an evaporator adapted for connection to said first manifold to heat said third medium and a rotary expander connected to an electricity generator; and an auxiliary control unit to control the ORC unit and operate said valve.

A boiler unit comprises an enclosure including: a first circuit of a first fluid heat exchange medium, the first circuit having a heating device to heat the first medium, a boost heat exchanger, a valve and a first manifold; a second circuit of a second heating system fluid heat exchange medium, the second circuit having a flow and return port of the boiler unit, a second manifold and said boost heat exchanger for exchange of heat between said first and second heat exchanger media when said valve is open; a space in the enclosure receiving an auxiliary unit to be driven substantially exclusively by said first fluid heat exchange medium; and a boiler control unit to control operation of the heating device according to heat demand of the heating device and otherwise irrespective of the auxiliary unit when connected; and an organic rankine cycle (ORC) unit comprising: a third fluid heat exchange medium circuit, the circuit including a condenser adapted for connection to said second manifold to provide heat to said second circuit, a pump to circulate said third medium, an evaporator adapted for connection to said first manifold to heat said third medium and a rotary expander connected to an electricity generator; and an auxiliary control unit to control the ORC unit and operate said valve.

Provided is a method for converting thermal energy into mechanical energy by use of an organic rankine cycle system that accommodates a working fluid composition. The method includes sequentially performing: evaporating the working fluid composition; expanding the working fluid composition; condensing the working fluid composition; and transferring the working fluid composition, while raising a pressure thereof, by a pump. The working fluid composition contains cis-1,3,3,3-tetrafluoropropene at a ratio higher than or equal to 92.0% by mass and lower than or equal to 99.9% by mass and trans-1,3,3,3-tetrafluoropropene or 2,3,3,3-tetrafluoropropene at a ratio higher than or equal to 0.1% by mass and lower than or equal to 8.0% by mass; and has an evaporation temperature higher than or equal to 60° C. and lower than or equal to 150° C.

Provided is a method for converting thermal energy into mechanical energy by use of an organic rankine cycle system that accommodates a working fluid composition. The method includes sequentially performing: evaporating the working fluid composition; expanding the working fluid composition; condensing the working fluid composition; and transferring the working fluid composition, while raising a pressure thereof, by a pump. The working fluid composition contains cis-1,3,3,3-tetrafluoropropene at a ratio higher than or equal to 92.0% by mass and lower than or equal to 99.9% by mass and trans-1,3,3,3-tetrafluoropropene or 2,3,3,3-tetrafluoropropene at a ratio higher than or equal to 0.1% by mass and lower than or equal to 8.0% by mass; and has an evaporation temperature higher than or equal to 60° C. and lower than or equal to 150° C.

A thermal energy recovery device includes: a circulating flow path connected to a heater, an expander, a condenser and a circulating pump for circulating a working medium; a bypass valve in a bypass path connecting the upstream side region and the downstream side region of the expander in the circulating flow path; a power recovery machine connected to the expander; a circulating pump sending the working medium condensed in the condenser to the heater; a cooling medium pump sending a cooling medium to the condenser; an upstream side sensor detecting the pressure/temperature of the working medium on the expander upstream side in the circulating flow path; and a controller controlling the bypass valve and the cooling medium pump. The controller opens the bypass valve after stopping the circulating pump, and drives the cooling medium pump if the pressure/temperature of the working medium on the expander upstream side exceeds a threshold.

Strain augmented power cycle is disclosed. This power cycle is a thermodynamic power cycle that contains a strain energy device to increase the thermodynamic efficiency above what is possible from a conventional Rankine power cycle. Strain augmented power cycle comprises an assembly of components including a working fluid, a pump, an evaporator, a strain energy device, an expander and a condenser.

This invention is about a cold dynamic cycle refrigeration apparatus, which makes up cold energy with cryogenic liquid refrigerant by liquid circulating pump boosting, after its temperature is increased via the cold regenerator, it flows through the expander to reduce pressure and temperature to provide the cold to the refrigeration apparatus, and then returns to the refrigerant tank via the cold regenerator, so as to form the cold dynamic cycle circuit of the refrigerant. This invention requires no circulation cooling water system as in a traditional steam compression refrigeration apparatus, so its maintenance and operation cost can be substantially reduced, with an apparatus of the same refrigerating capacity, it can save energy by more than 30% as compared with traditional ones, producing substantial economic, social and environmental protection benefits.