A METHOD FOR CONTROLLING THE TEMPERATURE OF A WASTE HEAT RECOVERY SYSTEM AND SUCH A WASTE HEAT RECOVERY SYSTEM

• Main Authors: BLOM, Ola, JOHANSSON, Björn, HÖCKERDAL, Erik
• Format: Patent
• Language: English; French; German
• Published: 04.09.2019
• Subjects: BLASTING; COMBUSTION ENGINES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; HEATING; HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINEPLANTS; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; TRANSPORTING; USE OF WASTE HEAT OF COMBUSTION ENGINES; VEHICLES IN GENERAL; WEAPONS

The invention relates to a method for controlling the temperature of a waste heat recovery system associated with a combustion engine, the waste heat recovery system comprising a working fluid circuit; at least one evaporator; an expander; a condenser and a pump arranged to pump the working fluid through the circuit, wherein the at least one evaporator is arranged for heat exchange between the working fluid and a heat source associated with the combustion engine, wherein the condenser of the waste heat recovery system is connected to a cooling system. The method comprises the steps of: determining if a combustion engine associated with the waste heat recovery system is about to be shut down; and controlling the temperature in the waste heat recovery system based on whether the combustion engine is about to be shut down or not.