closed system


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closed system

[¦klōzd ′sis·təm]
(engineering)
A system for water handling that does not permit air to enter.
(thermodynamics)
A system which is isolated so that it cannot exchange matter or energy with its surroundings and can therefore attain a state of thermodynamic equilibrium. Also known as isolated system.

closed system

A heating or refrigeration piping system in which the circulating water or brine is completely enclosed and under pressure above atmospheric.

closed system

A system in which the specifications are kept secret to prevent interference from third parties. It inhibits third-party software from being installed; it keeps third-party hardware from interoperating with it, and it prevents third-party enhancements from improving the product. Contrast with open system. See proprietary standards.
References in periodicals archive ?
- All closed systems - categories of products found
For example, under a fixed load, the mean response time for an open system model can exceed that for a closed system model by a high magnitude.
Polypropylene shredder tubes create a closed system for sample collection, preparation, storage, and transporting.
In a closed system, the mass may change form, but the amount would remain the same.
The closed system reduces adhesive contamination that can cause nozzle clogging, downtime and associated maintenance.
We are developing a closed system manufacturing process which will allow us to improve scalability, and reduce cost as we continue to move this program through clinical trials," said Thomas B.
The result is a nearly closed system that requires only feed for the fish and gas from the landfill to operate.
The researchers exposed each framework to increasing amounts of carbon dioxide gas in a closed system at room temperature.
The new ovens will feature an Advanced Closed System +3 with "Crisp and Tasty," "Press-and-Go" and a dispensing door, which have all been developed by Convotherm.
CLEVELAND, OHIO-BASED combi oven-steamer supplier Convotherm's patented Advanced Closed System allows the amount of steam used during cooking to be tailored exactly to the type and size of food inside the oven, providing consistent temperature and humidity control.
Since this is a totally closed system, oily chips are retained, helping to keep the production floor clean.
SuPure polymers can be unloaded at customer facilities using a closed system called the Flexicon bulk-bag discharger (supplied by Flexicon Corp., Bethlehem, Pa.), which carries the materials into feed systems with minimal handling and outside contact.