# GILLILAND CORRELATION

 Approximation method for distillation-column calculations; correlates reflux ratio and number of plates for the column as functions of minimum reflux and minimum plates.

## Related Terms

### PLAN EQUATION

The mathematical statement that horsepower plan/33,000, where p mean effective pressure (pounds per square inch), l length of piston stroke (feet), a net area of piston (square inches), and n number of cycles completed per minute.

### PIECEWISE LINEAR SYSTEM

A system for which one can divide the range of values of input quantities into a finite number of intervals such that the output quantity is a linear function of the input quantity within each of these intervals.

### PHASE CONVERTER

A converter that changes the number of phases in an alternatingcurrent power source without changing the frequency.

### PEG COUNT METER

A meter or register that counts the number of trunks tested, the number of circuits passed busy, the number of test failures, or the number of repeat tests completed.

### PEDOMETER

1. An instrument for measuring and weighing a newborn child. 2. An instrument that registers the number of footsteps and distance covered in walking.

### PARTICLE-SIZE DISTRIBUTION

The percentages of each fraction into which a granular or powder sample is classified, with respect to particle size, by number or weight.

### PARALLEL FIRING

A method of connecting together a number of detonators which are to be fired electrically in one blast.

### PACKING DENSITY

The number of devices or gates per unit area of an integrated circuit. packing ring See piston ring.

### PACKAGING DENSITY

The number of components per unit volume in a working system or subsystem.

### ON-STREAM FACTOR

The ratio of the number of operating days to the number of calendar days per year.

### Related questions

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