# WELL CAR

 Also known as stack car. A dropframe rail at car.

## Related Terms

### HOLLANDFORMULA

Aformulausedtocalculate the height of a plume formed by pollutants emitted from a stack in terms of the diameter of the stack exit, the exit velocity and heat emission rate of the stack, and the mean wind speed.

### INDIRECT ECHO

A radar echo which is caused by the electromagnetic energy being transmitted to the target by an indirect path and returned as an echo along the same path. An indirect echo may appear on the radar display when the main lobe of the radar beam is reflected off part of the structure of the ship (the stack for example) from which it is reflected to the target. Returning to own ship by the same indirect path, the echo appears on the PPI at the bearing of the reflecting surface. Assuming that the additional distance by the indirect path is negligible, the indirect echo appears on the PPI at the same range as the direct echo received. Also called FALSE ECHO.

### FURNACE DRAFT

The negative air pressure generated by buoyancy of hot gases inside a furnace. The temperature difference between gases within the furnace and in the atmosphere along with furnace and stack height basically determine the amount of draft generated by the furnace. Draft is generally measured in negative inches of water column. ('-w.c.'; 27.7 inches w.c. = 1 psig)

### THEORETICAL DRAFT

The draft which would be available at the base of a stack if there were no friction or acceleration losses from the stack.

### STACK EFFLUENT

Gas and solid products discharged from the stack.

### STACK LOSS

The fraction of total heat which exits with the flue gas through the stack. The quantity is customarily expressed as a percent of the total heat input. The stack loss is directly proportional to the stack exit temperature; the higher the temperature, the greater the stack loss.

### STACK

A vertical conduit, which due to the difference in density between internal and external gases creates a draft at its base.

### AIR CASING

An upper deck combing surrounding the funnel stack to protect the deck from heat and assist fireroom ventilation.

### CORNER POSTS

Vertical frame components fitted at the corners of the container, integral to the corner ttings and connecting the roof and oor structures. Containers are lifted and secured in a stack using the castings at the ends.

### STACK CAR

An articulated veplatform rail car that allows containers to be double stacked. A typical stack car holds ten 40foot equivalent units (FEU's).

### Related questions

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