Cooling arrangement for a WHR-system

Patent metadata

Field	Value
Publication number	US-10787935-B2
Application number	US-201515523533-A
Country	US
Kind code	B2
Filing date	Nov 4, 2015
Priority date	Dec 5, 2014
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A cooling arrangement for a WHR-system in a vehicle, includes a first cooling circuit including a first radiator in which a circulating coolant is cooled, and a second cooling circuit including a second radiator in which a coolant is cooled to a lower temperature than the coolant in the first radiator. A condenser inlet line directs coolant from one of the cooling circuits to a condenser to provide cooling for a working medium flowing therethrough. A cooling adjusting device adjusts the temperature of the coolant in the inlet line to the condenser by the coolant in the other cooling circuit based on information received about the coolant such that the coolant in the condenser inlet line provides the estimated suitable cooling of the working medium in the condenser.

First claim

The invention claimed is:

1. A cooling arrangement for a WHR-system in a vehicle, wherein the cooling arrangement comprises:
a first cooling circuit including a first radiator configured to cool a first coolant, a second cooling circuit including a second radiator configured to cool a second coolant to a lower temperature than the coolant in the first radiator;
a condenser configured to cool a working medium of the WHR-system, by using a condenser coolant,
wherein the condenser coolant is one of the first coolant or the second coolant, and the other of the first coolant or the second coolant is the other coolant;
a condenser inlet line configured for conducting the condenser coolant from one of the first and second cooling circuits to the condenser;
a cooling adjusting device configured for adjusting a temperature of the condenser coolant in the condenser inlet line by the other coolant conducted in the other cooling circuit of the first and second cooling circuits;
a sensor configured for sensing a parameter related to the cooling of the working medium in the condenser; and
a control unit configured to receive information about the parameter, to estimate a suitable cooling of the working medium in the condenser, and to control the cooling adjusting device such that the coolant in the condenser inlet line provides the estimated suitable cooling of the working medium in the condenser.

2. The cooling arrangement according to claim 1 , wherein the cooling adjusting device comprises:
a pre-condenser heat exchanger connected for receiving the condenser coolant directed to the condenser, and a
control valve configured and connected for directing an adjustable part of the other coolant to the pre-condenser heat exchanger for adjusting the temperature of the coolant directed to the condenser.

3. The cooling arrangement according to claim 1 , wherein the cooling adjusting device comprises a control valve configured to direct an adjustable coolant flow to the condenser.

4. The cooling arrangement according to claim 1 , wherein the sensor is configured to sense a parameter related to a condensing pressure in the condenser.

5. The cooling arrangement according to claim 1 , wherein the cooling arrangement is configured to cool the working medium in the condenser such that the working medium attains a condensation pressure within a predetermined pressure range.

6. The cooling arrangement according to claim 1 , wherein the sensor comprises temperature sensors configured to sense a temperature difference of the condenser coolant over the condenser.

7. The cooling arrangement according to claim 1 , further comprising:
a combustion engine, and the first cooling circuit and the first coolant therein are configured such that the first coolant in the first cooling circuit is configured to cool the combustion engine.

8. The cooling arrangement according to claim 1 , wherein the second coolant in the second cooling circuit is configured to cool a medium in at least one cooler.

9. The cooling arrangement according to claim 1 , wherein the first and second radiators are configured so that the coolant in the respective first and second radiators is cooled by an air flow over the first and second radiators; and
wherein the second radiator is arranged in an upstream position relative to the first radiator with respect an air flow direction through the radiators.

10. The cooling arrangement according to claim 2 , wherein one of the cooling circuits comprises a control valve configured for directing a part of the coolant flow in the cooling circuit to the radiator and a remaining part of the coolant in a bypass line past the radiator, and
the cooling circuit and the bypass line are configured so that the parts of the coolant are mixed and then conducted to the pre-condenser heat exchanger.

11. The cooling arrangement according to claim 2 , wherein the pre-condenser heat exchanger is arranged in a branch line configured for receiving the adjustable part of the first coolant from a first line of the first cooling circuit,
wherein the second coolant in the second line has a lower temperature than the first coolant in the first line.

12. The cooling arrangement according to claim 11 , wherein the branch line is configured to receive the first coolant from an engine outlet line in the first cooling circuit.

13. The cooling arrangement according to claim 1 , wherein the first cooling circuit and the second cooling circuit constitute separate circuits with separate coolants.

14. The cooling arrangement according to claim 7 , further comprising an evaporator for heating the working medium, and
the evaporator is configured for heating the working medium in the evaporator of the WHR-system by exhaust gases from the combustion engine powering the vehicle.

15. The cooling arrangement according to claim 1 , wherein the working medium in the WHR-system is ethanol.

16. The cooling arrangement according to claim 2 , further comprising:
a branch line configured to convey the adjustable part of the first coolant from an engine output line of the vehicle to the control valve, and from the control valve to the pre-condenser heat exchanger,
wherein the branch line is free of any heat exchangers before the pre-condenser heat exchanger.

17. The cooling arrangement according to claim 1 , wherein the cooling adjusting device adjusts the temperature of the coolant in the condenser inlet line by controlling a valve to regulate an amount of the other coolant conveyed by at least one of the first cooling circuit and the second cooling circuit.

Assignees

• Scania Cv Ab

Inventors

• Kardos Zoltan
• Hall Ola

Classifications

• F01P2060/00

  Cooling circuits using auxiliaries · CPC title

• F02G2260/00

  Recuperating heat from exhaust gases of combustion engines and heat from cooling circuits · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02G5/04

  in combination with other waste heat from combustion engines · CPC title

• F01K23/065 Primary

  the combustion taking place in an internal combustion piston engine, e.g. a diesel engine · CPC title