The tropical ocean is a giant collector of solar energy. Surface waters have temperatures around…

The tropical ocean is a giant collector of solar energy. Surface waters have temperatures around 24 °C, and deeper waters have temperatures around 4 °C. This temperature differential can be used to run engines that drive electrical generators.

(a) Estimate the amount of solar energy Qh − Qc stored in the ocean by means of this temperature differential; the warm surface layer is typically 200 m thick and the tropical ocean covers about 1/3 of the Earth’s surface area. (Earth’s radius is 6400 km.)

(b) The world consumes energy at a rate of about 9 billion kilowatts. How many joules of energy is this per year?

Save your time - order a paper!

Get your paper written from scratch within the tight deadline. Our service is a reliable solution to all your troubles. Place an order on any task and we will take care of it. You won’t have to worry about the quality and deadlines

Order Paper Now

(c) What fraction of the solar energy stored in the oceans would have to be harvested annually to meet the world’s energy needs?

(d) Answer part (c) for the case where 90% of the energy is lost during conversion.

(e) What is the Carnot efficiency for engines running between these two temperatures?

(f) What is the actual efficiency for engines running between these two temperatures if the coefficient of utility is 0.1?

 

 

Looking for a Similar Assignment? Let us take care of your classwork while you enjoy your free time! All papers are written from scratch and are 100% Original. Try us today! Use Code FREE15