Search results
Results from the WOW.Com Content Network
Following the international credit crisis and spikes in crude oil prices, Pakistan's economy could not withstand the pressure, and on 11 October 2008, the State Bank of Pakistan reported that the country's foreign exchange reserves had gone down by $571.9 million to $7,749.7 million. [64]
A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing ...
In variable-torque applications suited for Volts-per-Hertz (V/Hz) drive control, AC motor characteristics require that the voltage magnitude of the inverter's output to the motor be adjusted to match the required load torque in a linear V/Hz relationship. For example, for 460 V, 60 Hz motors, this linear V/Hz relationship is 460/60 = 7.67 V/Hz.
This allows fan or pump output to be varied to match process conditions, which can provide energy savings. A cycloconverter is also a type of frequency changer. Unlike a VFD, which is an indirect frequency changer since it uses an AC-DC stage and then a DC-AC stage, a cycloconverter is a direct frequency changer because it uses no intermediate ...
Airedale was privately owned until 2005 when it was acquired by US owned Modine Manufacturing Company. [12] Modine, with 2014 fiscal revenues of $1.5 billion, [ 13 ] specialises in air conditioning. Modine's products are used in light, medium and heavy-duty vehicles , heating, ventilation and air conditioning equipment ( HVAC ), off-highway ...
2022 Pakistan floods in summer cause over $30 billion dollars in economic losses in Pakistan. [43] At the end of March 2022, the State Bank of Pakistan's reserves stood at $11.425bn, but they gradually tanked to an almost four-year low of $6.715bn on 2 December. Pakistan's foreign exchange reserves equal to just five weeks of merchandise ...
The first inverter air conditioners were released in 1980–1981. [ 38 ] [ 39 ] In 1954, Ned Cole, a 1939 architecture graduate from the University of Texas at Austin , developed the first experimental "suburb" with inbuilt air conditioning in each house. 22 homes were developed on a flat, treeless track in northwest Austin, Texas , and the ...
Internal view of a solar inverter. Note the many large capacitors (blue cylinders), used to buffer the double line frequency ripple arising due to single-phase ac system.. A solar inverter or photovoltaic (PV) inverter is a type of power inverter which converts the variable direct current (DC) output of a photovoltaic solar panel into a utility frequency alternating current (AC) that can be ...