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The air compressors and motor gear train were far quieter; that along with the sealed windows and fluorescent lighting provided an isolated and relaxing environment for the passengers. Seating consisted of reversible 3-2 bench seats with a synthetic canvas covering with a total capacity of 130 persons per car, far more than the cars they replaced.
Sustainable automotive air conditioning is the subject of a debate – also known as the Cool War – about the next-generation refrigerant in car air conditioning. An advocacy group, The Alliance for CO 2 Solutions , supports the uptake of carbon dioxide (CO 2 ) as a refrigerant in passenger cars, and the chemical industry is developing new ...
In order to fit the air-conditioning equipment into the motor cars, the pantographs were moved to the trailers, effectively meaning that a motor car must remain semi-permanently coupled to a trailer car. Four driving trailer cars D4096–4099 were also ordered, allowing 2-car sets to be operated with power cars C3501–3504.
A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.
The 1992 Stock was built by British Rail Engineering Limited (BREL) (under ABB) for the Central line following extensive testing of the three 1986 tube stock prototype trains. [6] Eighty-five 8-car trains were ordered from BREL, each formed of four two-car units (two units had driving cabs, the others were fitted with shunting controls). [6]
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...
The light may dim briefly as the motor starts. When the armature is not turning (called locked rotor) there is no back-EMF and the motor's current draw is quite high. If the motor's starting current is high enough, it will pull the line voltage down enough to cause noticeable dimming of the light.
Partially-automated trains are used on eight lines: (Victoria, Jubilee, Central, Northern, District, Circle, Hammersmith and City, Metropolitan). [2] These trains still require operators to open and close the doors, and to assist in the event of an emergency. This method of working is also used on the Thameslink core [3] and is used on ...