News Column

Patent Issued for Heat Storage Device of Vehicle

August 27, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Choi, Yong Hyun (Hwaseong-si, KR); Kim, Yong Chul (Hwaseong-si, KR); Park, June Kyu (Hwaseong-si, KR); Park, Jungha (Gunpo-si, KR); Park, Man Hee (Suwon-si, KR); Lee, Ki-hyung (Ansan-si, KR); Son, Jung-wook (Ansan-si, KR), filed on June 25, 2012, was published online on August 12, 2014.

The patent's assignee for patent number 8800502 is Hyundai Motor Company (Seoul, KR).

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to a heat storage device of a vehicle that stores heat of a coolant in a phase change material when the coolant temperature is high, and uses the stored heat to heat the coolant when the coolant temperature is low.

"Generally, the heat energy of a coolant is exhausted outside through a radiator of a vehicle, wherein about 30% of total energy is lost through heat to increase fuel consumption and to destroy the environment.

"Accordingly, a heat storage system for a vehicle, which stores heat energy of a vehicle and exhausts the stored energy, is being researched.

"In the vehicle heat energy storage system, it is hard to store heat, considering its volume, complexity, weight, and heat storage amount. Also, a chemical heat storage method is excluded in the research, because the chemical material can be discharged in a traffic accident.

"An ice heat storage method in a latent heat storage method has features that weight and volume are large, and heat storage time is short, which is not appropriate for a vehicle generating a high temperature.

"Accordingly, research on a latent heat storage method using a phase change material having a high heat storage capacity has been being actively undertaken.

"The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art."

As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventors' summary information for this patent: "Various aspects of the present invention provide for a heat storage device of a vehicle having advantages of using heat energy that is stored in a phase change material to effectively heat a coolant when the coolant temperature is low and effectively managing a failsafe mode condition such as an overheat or overpressure condition of the phase change material.

"Various aspects of the present invention provide for heat storage device of a vehicle that may include an insulation container in which an outlet and an inlet are formed, a coolant passage that is disposed to penetrate the inlet and the outlet, wherein one end thereof is connected to a coolant outlet of an engine and the other end thereof is connected to a coolant outlet of the engine, a heat exchanger that includes a fin that is formed on the coolant passage inside the insulation container, a phase change material that is charged in the insulation container to exchange heat with coolant flowing in the coolant passage through the fin, a phase change material temperature sensor that detects a temperature of the phase change material that is charged in the insulation container, a pressure sensor that detects a pressure inside the insulation container, an engine coolant temperature sensor that detects a temperature of coolant circulating in the engine, and a control portion that circulates the coolant through the coolant passage according to the driving condition of the engine and the coolant temperature such that the coolant exchanges heat with the phase change material.

"A bypass line may be formed on the coolant passage to bypass the insulation container, and an inlet valve and an outlet valve may be respectively disposed at a point that the bypass line is diverged from the coolant passage and at a point that the bypass line joins the coolant passage.

"An outlet temperature sensor may be disposed at a downstream side of the outlet valve to detect a temperature of coolant that is exhausted through the outlet of the insulation container, and an inlet temperature sensor may be disposed at an upstream side of the inlet valve to detect a temperature of coolant that flows therein through the inlet of the insulation container.

"The heat storage device of a vehicle may further include a heater core that uses coolant flowing in the coolant passage to heat an interior room, and a heater core supply valve that selectively supplies coolant from the coolant passage to the heater core.

"If the temperature of the engine coolant that is detected by the engine coolant temperature sensor is less than a first predetermined value, the control portion may determine that it is in a cold state, close the heater core supply valve, and control the inlet valve and the outlet valve such that the coolant of the coolant passage flows through the heat exchanger to be heated by the phase change material.

"If the coolant temperature of the engine that is detected by the engine coolant temperature sensor is between the first predetermined value and a second predetermined value, the control portion may determine that it is in a warm-up middle condition, open the heater core supply valve, and control the inlet valve and the outlet valve to heat the coolant by using the heat of the heater core.

"If the coolant temperature of the engine that is detected by the engine coolant temperature sensor reaches the second predetermined value, the control portion may determine that it is in a warm-up condition, open the heater core supply valve, and control the inlet valve and the outlet valve such that the coolant of the coolant passage flows in the bypass line.

"If the coolant temperature of the engine that is detected by the engine coolant temperature sensor reaches a third predetermined value that is higher than the second predetermined value, the control portion may determine that it is in an overly warm condition, open the heater core supply valve, and control the inlet valve and the outlet valve such that the coolant of the coolant passage flows in the heat exchanger to make the coolant heat the phase change material.

"If the engine is turned off, the control portion may control the inlet valve and the outlet valve such that the heat energy stored in the phase change material cannot be exhausted outside through the coolant.

"The control portion may enter into a failsafe mode when the difference between the coolant temperature that is detected by the inlet temperature sensor and the coolant temperature that is detected by the outlet temperature sensor is less than a predetermined value based on the temperature of the phase change material that is detected by the phase change material temperature sensor.

"The control portion may enter into a failsafe mode if the rising speed of the temperature of the phase change material that is detected by the phase change material temperature sensor exceeds a predetermined value, or the rising speed of the pressure of the phase change material that is detected by the pressure sensor exceeds a predetermined value.

"The control portion may enter into a failsafe mode if the temperature of the phase change material that is detected by the phase change material temperature sensor is less than a predetermined value.

"The control portion may enter into a failsafe mode if the variation speed of the temperature of the phase change material that is detected by the phase change material temperature sensor exceeds a predetermined value, or the variation speed of the pressure of the phase change material that is detected by the phase change material pressure sensor exceeds a predetermined value.

"If the control portion enters into a failsafe mode, the control portion may light an emergency lamp of a cluster and control the inlet valve and the outlet valve such that the coolant is not supplied to the coolant passage inside the insulation container but is supplied to the bypass line.

"In accordance with various aspects of the present invention, a fuel consumption amount for warming an engine or heating an interior room is saved, a separate heating device or a warm up device such as a PTC heater can be replaced, quality of the exhaust gas is quickly improved, fuel consumption amount is reduced, and there is a merit in overcoming environmental regulations.

"The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention."

For additional information on this patent, see: Choi, Yong Hyun; Kim, Yong Chul; Park, June Kyu; Park, Jungha; Park, Man Hee; Lee, Ki-hyung; Son, Jung-wook. Heat Storage Device of Vehicle. U.S. Patent Number 8800502, filed June 25, 2012, and published online on August 12, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8800502.PN.&OS=PN/8800502RS=PN/8800502

Keywords for this news article include: Nanotechnology, Emerging Technologies, Hyundai Motor Company, Phase Change Material.

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Source: Journal of Engineering


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