The phrase "a closed tower" is correct and usable in written English.
It can be used to describe a tower that is sealed or not open to the public, often in architectural or metaphorical contexts.
Example: "The old castle featured a closed tower that had not been accessed for decades, shrouded in mystery and legend."
Alternatives: "an enclosed tower" or "a sealed tower".
And to ease the anticipated chaos, representatives of some tenants were permitted to enter the closed towers to retrieve important papers.
The open-backed mural towers, whilst cheaper to build than closed towers, could not have been easily defended once the wall had been penetrated, and because they projected only a little way from the wall, they provided very little options for enfilading fire against attackers close to the walls.
A closed wet cooling tower with novel design was proposed and numerically investigated.
A thermodynamic model was developed and used to assess the sensitivity of thermal performance characteristics of a closed wet cooling tower to inlet air conditions.
During the summer, the heat pump operates in cooling mode, coupled with a closed circuit cooling tower, providing space cooling for the building, and the hot water produced by the collectors is only used to produce domestic hot water.
Gilbert, J, and Tower, E. "Illustration of the Krugman's Monopolistic Competition Model for a Closed Economy from Chapter 18 of Gilbert and Tower (2013)." (November 9 , 2012.
By recapturing water vapor plumes and making cooling towers more of a closed system, Infinite Cooling's technology could decrease power plant water consumption by as much as 30percentt.
This can be accomplished by means of a cooling-stripping tower that operates in a closed circuit.
As it has since the 1970s, the government has pointed Indian Point toward a simple, sure way to solve the problem: cooling towers that recycle water in a closed loop and thus require very little from the river.
But the BlackBerry uses highly encrypted data that is received by wireless carriers' towers and is immediately routed through a closed, global network operated by the company.
