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| Tachometer (AC) (DC) |
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A device which generates an AC or DC signal proportional to the speed at which it is rotated and the polarity of which is dependent on the direction of rotation of the rotor.
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| Tangential |
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A tangential section is a longitudinal section through a tree perpendicular to a radius. Flat-grain lumber is sawn tangentially.
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| Tank |
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The reservoir or sump.
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| Temposonics |
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Linear displacement transducer.
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| Therm |
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A unit of energy equal to 100,000 Btus (= 105.5 MJ); used primarily for natural gas.
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| Thermal oil |
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A heat transfer fluid used instead of steam. They are not interchangeable within the same kiln. Thermal oil is capable of higher temperatures at low operating pressure and is not susceptible to freezing.
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| Thermochemical conversion |
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Use of heat to chemically change substances from one state to another, e.g. to make useful energy products.
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| Thermocouple (TC) |
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A sensor that measures temperature based on the voltage difference between two dissimilar metals.
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| Thermosetting glues and resins |
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Glues and resins that are cured with heat but do not soften when subsequently subjected to high temperatures.
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| Ton (T) |
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1. US unit of weight equal to 2,000 lb; also called a Short ton.
2. British unit of weight equal to 2,240 lb (1,016 kg); also called a Long ton.
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| Tonne |
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A unit of weight in the metric system equal to 1,000 kilograms or approximately 2,204 pounds. Also called a Metric ton.
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| Topping and back pressure turbines |
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Turbines which operate at exhaust pressure considerably higher than atmospheric (noncondensing turbines). These turbines are often multistage types with relatively high efficiency.
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| Topping cycle |
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A cogeneration system in which electric power is produced first. The reject heat from power production is then used to produce useful process heat.
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| Torque |
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A rotary thrust. The turning effort of a fluid motor usually expressed in inch pounds.
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| Torque converter |
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A rotary fluid coupling that is capable of multiplying torque.
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| Torque motor |
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A type of electromechanical transducer having rotary motion used in the input stages of servo valves.
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| Transducer (or feedback transducer) |
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An element which measures the results at the load and sends a signal back to the amplifier.
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| Transesterification |
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A chemical process which reacts an alcohol with the triglycerides contained in vegetable oils and animal fats to produce biodiesel and glycerin.
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| Traps |
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A device that separates condensate and air from the steam within the steam heating coils.
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| Traps, float and thermostatic |
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Traps that discharge condensate at a rate dependent on the position of an internal float. Air is removed through a thermostatic air vent.
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| Traps, inverted bucket |
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Mechanical traps that operate on the difference in the density between steam and water.
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| Traps, orifice |
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Traps that discharge steam at a constant rate and have no internal moving parts to alter or stem its flow.
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| Traps, thermostatic |
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Traps that use an internal bellows, which expands when steam flows to the trap, closing the orifice. As condensate accumulates the bellows contracts to release it.
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| Traveling grate |
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A type of furnace in which assembled links of grates are joined together in a perpetual belt arrangement. Fuel is fed in at one end and ash is discharged at the other.
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| Turbine |
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A machine for converting the heat energy in steam or high temperature gas into mechanical energy. In a turbine, a high velocity flow of steam or gas passes through successive rows of radial blades fastened to a central shaft.
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| Turbulent flow (turbulence) |
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A condition where the fluid particles move in random paths rather than in continuous parallel paths.
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| Turn down ratio |
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The lowest load at which a boiler will operate efficiently as compared to the boiler's maximum design load.
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| Two-way valve |
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A directional control valve with two flow paths.
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