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1. WO2021007202 - WASTE HEAT RECOVERY SYSTEM, COOLANT SYSTEM, AND CONTROL

Publication Number WO/2021/007202
Publication Date 14.01.2021
International Application No. PCT/US2020/040998
International Filing Date 07.07.2020
IPC
F01N 5/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
5Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
02the devices using heat
F01K 23/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
23Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
02the engine cycles being thermally coupled
06combustion heat from one cycle heating the fluid in another cycle
F01K 23/10 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
23Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
02the engine cycles being thermally coupled
06combustion heat from one cycle heating the fluid in another cycle
10with exhaust fluid of one cycle heating the fluid in another cycle
F01P 7/14 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
7Controlling of coolant flow
14the coolant being liquid
F01P 7/16 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
7Controlling of coolant flow
14the coolant being liquid
16by thermostatic control
Applicants
  • CUMMINS INC. [US]/[US]
Inventors
  • KRISHNAVAJJALA, Bhanu Teja
  • ERNST, Timothy C.
  • GUPTA, Rohit
  • ARAVAMUTHAN, Srikanth
Agents
  • BROWN, Marshall, J.
  • BRILL, Chase, J.
  • RAWLINS, Andrew, E.
Priority Data
62/871,35008.07.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) WASTE HEAT RECOVERY SYSTEM, COOLANT SYSTEM, AND CONTROL
(FR) SYSTÈME DE RÉCUPÉRATION DE CHALEUR PERDUE, SYSTÈME DE REFROIDISSEMENT ET COMMANDE
Abstract
(EN)
A system includes a coolant circuit, a waste heat recovery (WHR) circuit and a controller. The coolant circuit providing coolant to an engine includes a first coolant sub-circuit including a radiator valve and a radiator, and a second coolant sub-circuit including a WHR heat exchanger. The WHR system includes the WHR heat exchanger and a bypass valve coupled across the WHR heat exchanger. The controller coupled to the radiator valve and the bypass valve is configured to operate the bypass valve to direct working fluid into the heat exchanger if a coolant temperature is above a first threshold value, and operate the radiator valve to direct coolant from the second sub-circuit to the first sub-circuit if at least one of the coolant temperature is above a second threshold value, the working fluid temperature is above a third threshold value or the working fluid pressure is above a fourth threshold value.
(FR)
L'invention concerne un système comprenant un circuit de refroidissement, un circuit de récupération de chaleur perdue (WHR) et un dispositif de commande. Le circuit de refroidissement fournit un liquide de refroidissement à un moteur comprenant un premier sous-circuit de refroidissement comportant une soupape de radiateur et un radiateur, et un second sous-circuit de refroidissement comprenant un échangeur de chaleur WHR. Le système WHR comprend l'échangeur de chaleur WHR et une soupape de dérivation accouplée à l'entrée de l'échangeur de chaleur WHR. Le dispositif de commande accouplé à la soupape de radiateur et à la soupape de dérivation est conçu pour faire fonctionner la soupape de dérivation de façon à diriger un fluide de travail dans l'échangeur de chaleur si une température de liquide de refroidissement est supérieure à une première valeur seuil, et pour faire fonctionner la soupape de radiateur de façon à diriger le liquide de refroidissement du second sous-circuit au premier sous-circuit si la température de liquide de refroidissement est supérieure à une seconde valeur seuil, et/ou la température du fluide de travail est supérieure à une troisième valeur seuil et/ou la pression de fluide de travail est supérieure à une quatrième valeur seuil.
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