Vacuum Coolant Accumulator
Design
The coolant accumulator....
- consists of an inner and an outer tank
- storages the hot coolant fluid inside the inner tank
- insulates the inner tank via a high vacuum between the inner and the outer tank
- has two tube connectors one for intake respectively another for drainage for the coolant
Mode of operation
- During the working engine the cooling accumulator is flashed with hot coolant
- After engine stop the hot coolant remains inside the accumulator and loses due to its vacuum insulation only a small amount of heat energy
- For a following cold start the still hot coolant from the accumulator will be pumped into the engine block and replaces the cold coolant
- Therefor the cold engine heats up in between some seconds
- If the coolant operation temperature in the engine is achieved, the coolant accumulator will be flashed with hot coolant again
- The character of heat energy loss in a 3,6 liter coolant accumulator is visible in the diagram above during a period of 72 hours for an ambient temperature of 20°C