Abstract:
An arrangement for converting thermal energy to mechanical energy in a vehicle (1). A working medium is vaporized by a heat source (3) in the vehicle (1) and is thereafter expanded through a turbine (13) generating mechanical energy. A control unit (31) receives information indicating the vehicle (1) is to be braked and connects the cooling system (21, 39) of the vehicle to the vehicle's power train (2, 5-9) to cool a refrigerant to a low temperature. The control unit (31) receives information that the vehicle (1) requires extra propulsive force and, uses the cooled refrigerant to subject the working medium in the line circuit (10) to a second step of cooling before it is led to the evaporator (12). The condensation temperature of the working medium may thus be lowered and more mechanical energy may be generated in the turbine (13).
Abstract:
An exhaust post-treatment device (2) for a vehicle (4) for reducing nitrogen oxides present in the exhaust gases (20) of the vehicle (4) by supply of liquid reducing agent (18) to the exhaust gases (20) in an exhaust pipe (32). The device (2) locally warms a surface (31) within the exhaust pipe (32) by a Peltier element (6) by using thermal energy from the exhaust gases (20) to vaporize liquid reducing agent (18) which reaches the surface (31), thereby avoiding the formation of deposits of reducing agent within the exhaust pipe (32). Also a method for post-treatment of exhaust gases from vehicles with an exhaust post-treatment device (2) including a Peltier element (6).
Abstract:
An exhaust post-treatment device (2) for a vehicle (4) for reducing nitrogen oxides present in the exhaust gases (20) of the vehicle (4) by supply of liquid reducing agent (18) to the exhaust gases (20) in an exhaust pipe (32). The device (2) locally warms a surface (31) within the exhaust pipe (32) by a Peltier element (6) by using thermal energy from the exhaust gases (20) to vaporize liquid reducing agent (18) which reaches the surface (31), thereby avoiding the formation of deposits of reducing agent within the exhaust pipe (32). Also a method for post-treatment of exhaust gases from vehicles with an exhaust post-treatment device (2) including a Peltier element (6).
Abstract:
A radar level gauging system for determining a level of a surface of a product in a tank, comprising a propagation device arranged to allow microwave signals to propagate towards the surface, and to return a reflection of the microwave signals from the surface and at least two radar level gauge (RLG) units. Each RLG unit includes transceiver circuitry, processing circuitry connected to the transceiver circuitry and adapted to determine the level based on a relation between transmitted and received signals, and a communication interface. The system further comprises a communication link interconnecting the RLG units, for communicating control data between the RLG units, the communication link comprising an isolating interface, ensuring galvanic isolation between the RLG units.One unit may hereby communicate configuration data to the rest of the RLG units which results in a simplified configuration of the sensor system and thus more cost effective compared to the prior art solutions.
Abstract:
The invention relates to a method in operating a lined cavern provided for the storage of gas coming from a pipeline. During filling of the cavern with gas to a nominal pressure, at least a portion of the gas is withdrawn from the cavern and recirculated to the cavern under cooling and without substantial compression. The method also includes recirculating the gas under heating and without substantial compression.
Abstract:
An arrangement for maintaining an operating temperature of a battery (8) in a vehicle (1). A cooling system (12) with a circulating coolant. A radiator (14) to cool the coolant includes a heat-transfer region (12a) where the coolant is in contact with the battery (8). An AC installation with a circulating refrigerant includes a first circuit with a first evaporator (21) in which a refrigerant cools air in a driving cab space (2) of the vehicle (1), and a first condenser (17) where the refrigerant releases thermal energy; a second circuit with a second evaporator where the refrigerant cools the coolant in the cooling system (12), and a second condenser (24) where the refrigerant warms the coolant in the cooling system (12).
Abstract:
An arrangement for converting thermal energy to mechanical energy in a vehicle (1). A working medium is vaporised by a heat source (3) in the vehicle (1) and is thereafter expanded through a turbine (13) generating mechanical energy. A control unit (31) receives information indicating the vehicle (1) is to be braked and connects the cooling system (21, 39) of the vehicle to the vehicle's power train (2, 5-9) to cool a refrigerant to a low temperature. The control unit (31) receives information that the vehicle (1) requires extra propulsive force and, uses the cooled refrigerant to subject the working medium in the line circuit (10) to a second step of cooling before it is led to the evaporator (12). The condensation temperature of the working medium may thus be lowered and more mechanical energy may be generated in the turbine (13).
Abstract:
An arrangement and a method for converting thermal energy to mechanical energy. The arrangement has a line circuit (3), circulation device (4) for circulating a zeotropic refrigerant mixture in the line circuit (3), an evaporator (6) in which the refrigerant mixture is vaporised by a heat source (7), a turbine (9) driven by the vaporised refrigerant mixture, and a condenser (12) which cools the refrigerant mixture so that it condenses. A control unit assesses whether the refrigerant mixture does not become fully vaporised in the evaporator (6) and, leads incompletely vaporised refrigerant mixture leaving the evaporator to a separating device (14) in which a liquid portion of the refrigerant mixture is separated from the gaseous portion, after which only the gaseous portion proceeds towards the turbine (9).
Abstract:
An arrangement and a method for converting thermal energy to mechanical energy. The arrangement has a line circuit (3), circulation device (4) for circulating a zeotropic refrigerant mixture in the line circuit (3), an evaporator (6) in which the refrigerant mixture is vaporized by a heat source (7), a turbine (9) driven by the vaporized refrigerant mixture, and a condenser (12) which cools the refrigerant mixture so that it condenses. A control unit assesses whether the refrigerant mixture does not become fully vaporized in the evaporator (6) and, leads incompletely vaporized refrigerant mixture leaving the evaporator to a separating device (14) in which a liquid portion of the refrigerant mixture is separated from the gaseous portion, after which only the gaseous portion proceeds towards the turbine (9).
Abstract:
An arrangement and a method for converting thermal energy to mechanical energy includes a circulation unit (4) a refrigerant in the a circuit (3), an evaporator (6) for the refrigerant, a turbine (9) driven by vaporised refrigerant, a condenser (12) cooling the refrigerant to condense, and an accumulator tank (14) for storage of the refrigerant is not being circulated in the line circuit (3). A control device estimates the degree of filling of the line circuit (3) with refrigerant at which the turbine (9) achieves a substantially optimum effect, and controls the flow of refrigerant between the line circuit (3) and the accumulator tank (14) to achieve the estimated degree of filling the line circuit (3) with refrigerant.