Sola free essay sample

Location 1 11 July 1200 UTCWModerate 11 July 1800 UTCNWGentle 12 July 0000 UTCWModerate 12 July 1200 UTCNEStrong 13 July 1200 UTCNEStrong Location 2 11 July 1200 UTCNModerate 11 July 1800 UTCNWGentle 12 July 0000 UTCNWModerate 12 July 1200 UTCWGentle 13 July 1200 UTCSWGentle b) I) The wind direction variation is not great and the speeds do not chande too much either. That would be great for wind generation regardless the low speeds of the wind. II) Great variations in the wind direction that goes from N to NW and then to SW are not good for wind generation as the turbines do not have the capacity to change directions that much. The wind direction changes due to the cold front that pass trough that area. The low speed of winds alos does not help in the generation. Question 2 a) I) Location 1 To calculate the pressure at 110m we use the expression: z=Po? EXP-zH So, substituting the values we have P110=101. 5 ? EXP-1108000 And as result we got 100. 1kPa To calculate the temperature at 110 we use: Tz=To-? z-zo) So, substituting the values we have T110=285. We will write a custom essay sample on Sola or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page 15-100? 0. 005 And as result we got 284. 65 x10? To calculate the density of the air we use: ? =3. 4836? PT So, substituting the values we have ? =3. 4836? 100. 114284. 65 And as result we got 1. 225 Location 2 In location 2 we use the same expressions So, for pressure at 110m we have : P1100=101. 5 ? EXP-11009000 As result we got: 89. 8 x 10? Pa For temperature at 110m we have : T1100=285. 15-100? 0. 005 As result we got: 289. 1 x 10? For the density of air we have : ? =3. 4857? 89. 82289. 15 As result we got: 1. 082 II) In the location 1 the direction is SW and in the location 2 the direction is SE III) Location 1 To calculate the coriolis fator we use the expression:f=2 sin? Substituting the values we have f=1. 458? 10-4? sin(410) And as result we got 0. 11 x 10-4 (1s) To calculate the air density at see level we use the expression:? =3. 4857? PT Substituting the values we have:? =3. 4857? 101. 5285. 15 And as result we got: 1. 24 To calculate the wind speed near surface we use the expression:U=1 f P? D Where ?P=400 ?D=200 Substituting the values we haveU=11. 24? 0. 11 x 10-4? 400200? 103 And as result we got: 14. 4ms Location 2 In location 2 we use the same expressions So, for coriolis fator we have : f=1. 458? 10-4? sin(310) As result we got: 0. 11 x 10-4 (1s) For air density we have : ? =3. 4857? PT As result we got: 1. 24 For the wind speed near surface we have : ?P=400 ?D=280 So, U=11. 09? 0. 11 x 10-4? 400280? 103 As result we got: 11. 7ms IV) The location 1 can be classified as near gale (number 7) and location 2 can be classified as strong breeze (number 6). V) To calculate the power we use the expression: P=0. 5 v3 So for location 1 we have: 0. 5*1. 225*14. 443=1. 85kWm2 And for location 2 we have: 0. 5*1. 082*11. 733=0. 87kWm2 b) The profile of the terrain can change the velocity of the wind, due to its roughness the changes from each terrain. If the velocity od the wind is changed, the power will also change. The wind speed can influence in the power because it is related exponencially with it. Small variances in speed can cause a huge difference in the power generated. The topography of the site can interfeer as well because it can create obstacles for the wind or turbulance, changing the generated power. The pressure can also affect the power, the higher the pression is the best for the wind power potencial because the air density i salso greater. c) This evaluation is not suficiente because we have to take in account others elements that are no related to the power generated, like the proximity to roads and transmission lines. The demografic density of the site, the presence of national parks and problems with the society like noise and visual polution. Question 3 In the winter the the high pressure area in the ocean results in soutern winds in location 1 and 2. Since the isobars are closer in location 2 the winds there are stronger then in location 1. In the summer the pressure area in the ocean becomes low. It causes a change in wind directions are from NW. Those changes in the wind direction are not good for the wind genertion. The location 2 has greater wind speeds than location 1, what make it a better place a wind farm. Question 5 a) The available wind energy can be calculated by the following expression.