A wind farm comprised of 10 wind turbines E-40 (see power curve below) operates in a...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A wind farm comprised of 10 wind turbines E-40 (see power curve below) operates in a remote network. The average wind speed for a given day can be assumed to be 5 m/s from 00:00 to 08:00, 12 m/s from 08:00 to 16:00 and 10 m/s from 16:00 to 24:00. Experience has shown that the best efficiency of the E-40 wind turbine is about 75 % of that of an ideal turbine. The rotor design to be used is a three-bladed rotor, which results in a downstream velocity equal to a third of the upstream wind if the tip speed ratio is λ = 6.0. Air density can be considered as 1.225 kg/m³. Power (kW) 600 550 500 450 400 350 300 250 200 150 100 50 0 ENERCON E 40 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Wind Speed (m/s) Figure Q1: Performance curve of the ENERCON E40 wind turbine (a) Calculate the efficiency of the turbine at λ = 6.0. Is this the best efficiency of the turbine? (b) Determine the rotor diameter required for the proposed wind turbine. (c) Determine the rotation rate of the rotor. (d) Estimate the wind energy production during this day and the corresponding energy surplus if the daily energy demand is 3 MWh from 00:00 to 8:00, 32 MWh from 8:00 to 16:00 and 14 MWh from 16:00 to 24:00. A wind farm comprised of 10 wind turbines E-40 (see power curve below) operates in a remote network. The average wind speed for a given day can be assumed to be 5 m/s from 00:00 to 08:00, 12 m/s from 08:00 to 16:00 and 10 m/s from 16:00 to 24:00. Experience has shown that the best efficiency of the E-40 wind turbine is about 75 % of that of an ideal turbine. The rotor design to be used is a three-bladed rotor, which results in a downstream velocity equal to a third of the upstream wind if the tip speed ratio is λ = 6.0. Air density can be considered as 1.225 kg/m³. Power (kW) 600 550 500 450 400 350 300 250 200 150 100 50 0 ENERCON E 40 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Wind Speed (m/s) Figure Q1: Performance curve of the ENERCON E40 wind turbine (a) Calculate the efficiency of the turbine at λ = 6.0. Is this the best efficiency of the turbine? (b) Determine the rotor diameter required for the proposed wind turbine. (c) Determine the rotation rate of the rotor. (d) Estimate the wind energy production during this day and the corresponding energy surplus if the daily energy demand is 3 MWh from 00:00 to 8:00, 32 MWh from 8:00 to 16:00 and 14 MWh from 16:00 to 24:00.
Expert Answer:
Answer rating: 100% (QA)
a To calculate the efficiency of the turbine at tip speed ratio A 60 we need to find the corresponding wind speed on the power curve From the power curve we can see that the wind speed corresponding t... View the full answer
Related Book For
Quantitative Analysis For Management
ISBN: 9780137943609
14th Edition
Authors: Barry Render, Ralph M. Stair, Michael E. Hanna, Trevor S. Hale
Posted Date:
Students also viewed these accounting questions
-
Solve the matrix equation AX = B for X. A = X= 16 6 7 18 B= - 14 3 -
-
Review the Financial Statements provided to each group on Blackboard (You may use laptops for this exercise). [ Focus on: a) Is the company Profitable b) Does the company have a lot of liabilities c)...
-
Figure 1 shows a partial map of the streets in New York City. (Such maps are discussed in Chapter 5.) A tourist starts at point A and selects at random a shortest path to point B. That is, they walk...
-
The unstretched length of spring AB is 3 m. If the block is held in the equilibrium position shown, determine the mass of the block at D. 3 m -3 m- KAC = 20 N/m D A -4 m- B www. KAB = 30 N/m
-
Based on the information for Norwegian Bristling Company for the year ended December 31, 2018: a. How much is the firms net working capital and what is the debt ratio? b. Complete a statement of cash...
-
Anticipated sales for Safety Grip Company were 42,000 passenger car tires and 19,000 truck tires. Rubber and steel belts are used in producing passenger car and truck tires according to the following...
-
What industry is Airbnb in? Is Airbnb in a risky industry? Why/when Airbnb begin its operations? Has Airbnb announced an IPO, or possibly a SPAC deal, since it received its initial funding? If now...
-
?? Problems (4) to (8) below are based on Example Problem 13.4 Example Problem 13.4 FIGURE 13.41 System for Example Problem 13.4 80 ft Figure 13.41 shows a pumped fluid flow system that is being...
-
AMERICAN BEAUTY OR AMERICAN HUSTLE a) Analyze one longer scene from the film using two of the following theories: psychoanalytic model realist model ideological model (10%) b) within your answers...
-
Change is inevitable in organizations and must be effectively managed by a change agent. Based off your course material, define and identify at least one characteristic of an internal change agent....
-
If the Fl wishes to hedge the balance sheet with T-bond options that have a delta of -0.8. The underlying long-term Treasury bonds for the option have a duration of 10 years and trade at a market...
-
Do neutrinos have mass ? Definitive evidence has emerged for neutrinos having mass. The implications are significant, as discussed in this chapter. There are effects on the closure of the universe...
-
Miller's Hardware plans on saving $40,000, $50,000, and $58,000 at the end of each year for the next three years, respectively. How much will the firm have saved at the end of the three years if it...
-
20 points each 1. Management wants to see all sales for each genre. Required Components: 1) A bar chart depicting Global Sales in million USD versus Genre in the other axis. 2) Display the Sum total...
-
2. Find the Q-point for the transistor in the circuit if VDD = +12 Vv. Assume VTN = 0.60 V (20 pts) 100 kN W _ 20
-
The diameter of a sphere is 18 in. Find the largest volume of regular pyramid of altitude 15 in. that can be cut from the sphere if the pyramid is (a) square, (b) pentagonal, (c) hexagonal, and (d)...
-
The following table gives the average monthly exchange rate between the U.S. dollar and the euro for 2018. It shows that 1 euro was equivalent to 1.22 U.S. dollars in January 2018. Develop a trend...
-
Griffin is studying the length of a particular capacitated queue on the factory floor of Blackhurst Enterprises. He samples the data and makes point estimates of the proportions of going from a...
-
What is a two-person, zero-sum game?
-
Allister Company uses both debt capital and equity capital to fund new projects. The before-tax cost of debt capital is 12 percent. The cost of equity capital is 10 percent. Allister's effective tax...
-
Use an Internet search engine to identify three companies or agencies that use present worth analysis to make business decisions as evidenced in their annual reports.
-
Use the Internet to access ConocoPhillips's most recent annual report. a. What evidence do you find that ConocoPhillips continues to rely on present worth analysis in its corporate decision making?...
Study smarter with the SolutionInn App