What is a back work ratio?

Back Work Ratio : The fraction of the work produced by the turbine that is consumed by the compressor.

How do you calculate work ratio?

The working ratio measures a company’s ability to recover operating costs from annual revenue. It is calculated by taking total annual expenses, excluding depreciation and debt-related expenses, and dividing it by the annual gross income. The lower the ratio, the more profitable a company is.

What is CP in Brayton cycle?

2: T-s and P-v diagrams for ideal Brayton cycle. where rP is called the pressure ration and k = cp /cv is the specific heat ratio. Given that the maximum and minimum temperature can be prescribed for the Brayton cycle, a change in the pressure ratio can result in a change in the work output from the cycle.

How is work ratio determined in steam power plant?

The net-work in the turbine is given by Wturbine – Wcompressor, because the compressor is work consuming device therefore it consumes the work. ∴ Work ratio depends on r P (Pressure ratio), γ (ratio of specific heats), temperature ratio (T 1/T 3).

What is the efficiency of Rankine cycle?

In modern nuclear power plants, which operate the Rankine cycle, the overall thermal efficiency is about one-third (33%), so 3000 MWth of thermal power from the fission reaction is needed to generate 1000 MWe of electrical power.

What is work ratio in Rankine cycle?

And the work ratio is defined as the ratio of the net work W to the gross work output Wg, i.e. W/Wg. The Carnot cycle has a low work ratio. … In a simple Rankine cycle, steam is used as the working fluid, generated from saturated liquid water (feed-water).

What is the ratio of 3 to 5?

If put this into a calculator (3 divided by 5), you will get a decimal of 0.6 as the answer. This means that any two numbers that divide and come to the same answer are equivalent to 3/5.

What is the formula of time and work?

Important Time and Work Formula Work Done = Time Taken × Rate of Work. Rate of Work = 1 / Time Taken. Time Taken = 1 / Rate of Work. If a piece of work is done in x number of days, then the work done in one day = 1/x.

What is the formula for efficiency?

Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (product) produced per the amount C (cost) of resources consumed.

How do you solve a Brayton cycle?

What is cycle pressure ratio?

The ratio of the maximum to minimum pressure in the cycle is 4.0 and the maximum cycle temperature is 1200 K. … The compression process occurs in two stages, each having a pressure ratio of 2.0 with intercooling to 300 K in between. A 75% effective regenerator reduces fuel costs.

What is ideal Brayton cycle?

Ideal Brayton cycle: isentropic process – ambient air is drawn into the compressor, where it is pressurized. isobaric process – the compressed air then runs through a combustion chamber, where fuel is burned, heating that air—a constant-pressure process, since the chamber is open to flow in and out.

What is steam power cycle?

In steam power plants and refrigeration cycles, the working fluid changes from liquid to vapour and back to liquid state. This succession of processes is called vapour cycle. In steam power plants, water is the working fluid in the form of steam and vapour.

Which cycle is used in steam power plant?

steam Rankine cycle The steam Rankine cycle is one of the highest utilized types of thermodynamic cycles for electricity production in the world [1]. The steam power stations run on Rankine cycles using steam as a working fluid. The simple ideal Rankine cycle is in fact the most basic vapor power cycle.

What is the principle of operation of steam power plant?

What is the principle of operation of steam power plant? Explanation: The Rankine cycle is an idealized thermodynamic cycle of heat engine. Under this cycle heat energy is converted into mechanical energy while undergoing phase change.

What is Rankine efficiency formula?

The thermal efficiency of Rankine cycle is given as: Since change in specific volume is negligible hence assuming it as constant. So Dh = v Dp.

How do you calculate cycle efficiency?

Process Cycle Efficiency – The Calculation Process Cycle Efficiency = Value-Added Time / Cycle Time.

What are the four processes of Rankine cycle?

The four processes of an ideal Rankine cycle are as follows;

What is work ratio of a cycle?

The work ratio of a gas turbine plant is defined as the ratio of Net work output and work done by turbine.

What is a superheated Rankine cycle?

, the boiler produces superheated vapor. This helps maintain a high quality vapor-liquid mixture at the turbine effluent. Because the high pressure isobar slopes upward outside of the two-phase envelope,QHincreases by a larger percentage than QC increases.

What is ideal regenerative cycle?

In an ideal regenerative Rankine cycle, steam enters the turbine at the boiler pressure and expands isentropically to an intermediate pressure. Some steam is extracted at this state and routed to the feedwater heater, while the remaining steam continues to expand isentropically to the condenser pressure.

What is the ratio of 2 to 5?

2:5 The ratio is 2 to 5 or 2:5 or 2/5. All these describe the ratio in different forms of fractions. The ratio can consequently be expressed as fractions or as a decimal. 2:5 in decimals is 0.4.

How do you simplify 3 numbers in a ratio?

What is the ratio 2 to 3?

what does a value shared in the ratio 2:3 mean? this means that there are 5 parts to share out altogether. (2+3=5) So you take the value you wish to share and divide it by 5.

What is work with formula?

To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.

What is the formula of time?

FAQs on Time Formula The formula for time is given as [Time = Distance ÷ Speed].

What is the formula of time and distance?

To solve for time use the formula for time, t = d/s which means time equals distance divided by speed.

How do you solve an efficiency problem?

efficiency = (10 + 20)% = 30%. This means in one day A and B together can do 30% of the work. Therefore, Number of days A and B together take to do 100% of work = (100/3) days = 3.33 days.

What is a good efficiency ratio?

An efficiency ratio of 50% or under is considered optimal. If the efficiency ratio increases, it means a bank’s expenses are increasing or its revenues are decreasing. … This means the company’s operations became more efficient, increasing its assets by $80 million for the quarter.

What is velocity ratio formula?

The velocity ratio (V.R.) of a machine is the ratio of distance moved by the effort to distance moved by the load. Formula – Velocity Ratio = Distance moved by the effort / Distance moved by the load = y/x. The velocity of given machine can also be determined by assuming the machine to be ideal.