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When are pressure cycle ventilators preferred over volume cycle ventilators?
Wiki User
∙ 14y ago
Do you mean pressure control and volume control?? instead of cycle?
IF YES,
Pressure control is used when you want a specific peak airway pressure aka PIP
it is also used the mode of choice in the NICU and PICU
Volume control is used when you want to reach a desired tidal volume.
These are also dependent on the patients lung characteristics. It is also important to remember that in either mode it is possible to manipulate the other variables such as inspiratory flow, rate, rise time and I:E (to name a few) to obtain or control volume or pressure.
Wiki User
∙ 14y ago
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Why dual combustion cycle is called as limited pressure cycle?
In dual combustion cycle heat is added at constant volume which increases the efficiency of cycle, whereas heat addition at constant pressure limits the maximum pressure of the cycle.
Why does the water backup out of the wash drain during rinse cycle?
To much volume based on DFU's
How calculate the engine work from pressure crank-angle diagram?
Well Work is the integral of P*dV and since the crank angle plot doesn't directly show volume you need to calculate instaneous volume of the cylinder as a function of crank angle. If you know the bore and stroke you can find the volume of the cylinder and you can relate this to the crank angle. Once you have these values you can replace the crank angle with volume and have a P-V plot or pressure on the y-axis and volume on the x-axis. Then you can integrate the area under the curve and find the work from the engine. However, all this is done for you if you can find the P-V diagram for your engine or engine cycle (Sterling, Atkinson, Otto, Diesel, etc.) and integrate this for the work.
What is the percent of electricity produced by the process of heating steam to power a turbine in USA?
I can't answer for fossil (high pressure) cycles, but for the Nuclear Steam Supply Cycle (intermediate pressure) the efficiency is about 33%.
What controls the heat pump to determine whether it in the heating cycle or cooling cycle?
The refrigerant is pumped round the system, one way or the other. The warm side is the high-pressure side on one side of the nozzle.
Why dual combustion cycle is called as limited pressure cycle?
In dual combustion cycle heat is added at constant volume which increases the efficiency of cycle, whereas heat addition at constant pressure limits the maximum pressure of the cycle.
Compare Brayton and Otto cycle?
The heat addition and rejection processes in otto cycle are of constant volume, whereas in brayton cycle, they are of constant pressure.
Dual combustion cycle?
From Wikipedia, the free encyclopedia Dual Combustion Cycle (also known as the limited pressure or mixed cycle, Seiliger cycle or Sabathe cycle) is a thermal cycle that is a combination of the Otto cycle and the Diesel cycle. Heat is added partly at constant volume and partly at constant pressure, the advantage of which is that more time is available for the fuel to completely combust. Because of lagging characteristics of fuel this cycle is invariably used for diesel and hot spot ignition engines. The dual cycle consists of following operations: # Adiabatic compression # Addition of heat at constant volume. # Addition of heat at constant pressure. # Adiabatic expansion. # Rejection of heat at constant volume.
What is the definition of pressure ratio?
ratio of maximum to minimum pressure only case of constant volume heat addition in engine cycle
What is a graph illustrating the pressure and volume changes during one heartbeat called?
Cardiac Cycle
What is the difference between otto cycle and diesel cycle?
the difference is the heat addition type In Otto Cycle the heat addition is Isochoric ((constant volume)) In Diesel Cycle the heat addition is Isobaric ((constant pressure))
Why does the heat is added at constant volume in Otto cycle and at constant pressure in Diesel cycle?
in otto cycle the burning of fuel is instantaneously therefore a very small voulme is required for burning of fule
Difference between air refregeration cycle and reversed carnot cycle?
the Carnot cycle has 2 constant specific volume processes (heat in & heat out) the air refrigeration cycle is based on a brayton cycle which has two constant pressure processes.
Why the volume of a cycle tire is constant even if the pressure increase?
It really is not constant, but to solve problems that want you to only use Boyle's Law and not the combined gas law it is important that you assume that volume is constant. The change in volume is not really that great.
How automobile engine applied to Boyle's law?
As volume changes so does pressure. During the compression cycle of an engine, the volume is decreasing causing the pressure to increase. This happens so rapidly that I do not believe that temperature stays constant. For this to actually be following Boyle's law the temp is supposed to remain constant.
What is mean effective pressure in IC engine?
Mean effective pressure (mep ) is a parameter indicating a engine's performance, which is obtained by dividing mechanical work done in a cycle (W)by volume swept in a cycle (V). Clearly work is the product of pressure and volume or torque and angle. Since torque is a measurable quantity, the work per cycle can be calculated as W = T * 2pi ( 2 stroke engine), W = T * 4pi ( 4 stroke engine) therefore mep = W / V = T * 2pi / V or T * 4pi / V
Is two cycle oil mixed by weight or volume?
Mixed by volume and by ratio.
