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The term punkah louvre refers to the directional outlet for cool air in aircraft, particularly those over the passenger seats. In India, the punkhawallah or pankha wallah was the servant who operated the fan, often using a pulley system. [2]
The Thermo-Reg Louvre was a development of the Punkah Louvre where the output temperature could be controlled at the louvre. [16] Illustration of Punkah Louvre patented and manufactured in 1920 by Thermotank limited. The Thermotank system showing a Punkah Louvre, arrowed, fitted on an LNER train sleeping car in the 1930s. 1939-45. During World ...
In 1901 the three brothers formed their own Glasgow-based company, Thermotank, [1] which successfully pioneered heating, cooling and ventilation systems, including the 'Punkah Louvre' and 'Thermo-Reg Louvre', fitted in ships, aircraft, trains and buildings.
The displacement outlets are usually located at or near the floor with the air supply designed so the air flows smoothly across the floor. Where there is a heat source (such as people, lighting, computers, electrical equipment, etc.) the air will rise, pulling the cool supply air up with it and moving contaminants and heat from the occupied ...
Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.
Kearny air pump in doorway (with flaps open during its return stroke) The Kearny air pump is an expedient air pump used to ventilate a shelter. The design is such that a person with normal mechanical skills can construct and operate one. It is usually human-powered and designed to be employed during a time of crisis.
Ventilation efficiency is determined by design and layout, and is dependent upon the placement and proximity of diffusers and return air outlets. If they are located closely together, supply air may mix with stale air, decreasing the efficiency of the HVAC system, and creating air quality problems.
Apple offered an EmPower MagSafe power adapter for their MacBook, MacBook Pro, and MacBook Air lines of notebooks, and also included a cigarette lighter socket adapter. However, this system would only run the computer without charging the computer's battery, and Apple warned users to never plug this device into a car's cigarette lighter outlet. [5]