Block Diagram Heat Exchanger

It uses raw lake or ocean water brought in from the raw water pump to act as coolant for the engines circulating water.

Block diagram heat exchanger. The heat exchanger is the heart of the closed cooling system. Two types of heat exchanger. Fuel is combusted and the hot gas is sent through the heat exchanger the heat of this is convected into the walls of the heat exchanger the cooler ducted air passes across the other side causing a temperature difference so the heat of the gas is conducted through the wall and will be carried away by convection. A block diagram representation of the open loop process is shown below.

1 a shell and tube exchanger from the savannah river nuclear plant in south carolina united states. Lifting device separate device that are attached on the heat exchanger used for lifting the heat exchanger. In this block diagram classical pid controller is used as the controller. The block diagram of a closed loop feedback control setup of heat exchanger system is shown in fig.

Sign in to download full size image figure 15 18. Raw water which has removed heat from the engine through the heat exchanger is then injected into the exhaust elbow to quench the exhaust. Equipped with models for the heat exchanger and inflow disturbance we are ready to design the control algorithm. In a full system i e.

Plate fin heat exchangers have lots of thin metal plates or fins with a large surface area because that exchanges more heat more quickly. Heat exchangers in gas furnaces gas boilers work this way. Sensor r s u s actuator process y s flow disturbance d s feedback controller figure 4. A similar bump test experiment could be conducted to estimate the first order response to a step disturbance in inflow temperature.

Earthing lug an earthing connection is used to eliminate the risk of static electricity building up in the equipment. Thinking through the port configurations and labels facilitates the interface definitions that are further specified on the internal block diagram. Mercruiser is by volume the largest marine engine company on the planet providing high quality products with excellent distribution the only difference you ll see with our replacement mercruiser heat exchangers is the price. Analyzes each of the blocks found in a feedback only control loop.

Both features are common to all counterflow heat exchangers. Exact replacements for mercruiser heat exchangers and other mercruiser engine cooling devices are sold by mr. The heat exchanger has a cold loop c in and c out and a hot loop h in and h out. For applications where the heat exchanger surface will be hot or cold insulation can be used.

The circulating water runs in a closed loop through the engine only in a half system and in a full system the exhaust manifold as well.