logo
+1-617-874-1011 (US)
+61-7-5641-0117 (AU)
+44-117-230-1145 (UK)
Live Chat

EEE463 Homework 9 Solution

Problem: A solar thermal plant with energy storage capability is to be constructed at about a 40° latitude to provide the electric energy to a power system whose 24-hr average load is 100 MWe during the winter. Assume that the solar thermal power plant will have a 25% energy conversion efficiency; that the nighttime load is 40% of the total daily load; and that 10% of the energy that must be stored is lost. Calculate the total land area (in km2) required for each of the following two solar thermal plant options: (a) fixed horizontal system, and (b) parabolic reflector system. The reflected energy collected at 40° latitude in winter is 6 kWꞏhr/(m2ꞏday) for a tracking system, and only 1.85 kW.hr/(m2.day) for a horizontal fixed system. It is believed that the parabolic reflector system can be set up so that the reflectors cover 45% of the land area on which they are placed without shading one another.

Solution:

Daytime load = (100 MWe) (0.60) (24 hrs/day) = 1440 MW.hr/day

Nighttime load = (100 MWe) (0.40) (24 hrs/day) = 960 MW.hr/day

Total energy needed to fulfill the nighttime load, including stored energy loss

= (960 MW.hr/day) / (0.9) = 1067 MW.hr/day

Total daily electric energy needs = Daytime load + Nighttime load = 1440 + 1067 = 2507 MW.hr/day

Required thermal load = (2507 MW.hr/day) / (0.25) = 10,028 MW.hr/day

(a) For a fixed horizontal system: Energy collected = 1.85 kW.hr/(m².day)

Area= 10,028*10³ kW.hr/day/(1.85 kW.hr/m².day) = (54*10&sup6 m²)(1 km/1000)²

=5.4km²

(b) For a tracking system using reflectors: Energy collected = 6 kW.hr/(m².day)

Area= 10,028*10³ kW.hr/day/(6 kW.hr/m².day)(0.45) = (3.7*10&sup6 m²)(1 km/1000)²

=3.7km²

Want a fresh copy of this sample assignment
Improve Your Grades with Custom Writing Help
Homework Help
Writing Help
Editing Services
Plagiarism check
Proofreading services
Research Project help
Custom writing services
scanner
E learning blogs

Disclaimer : The study tools and academic assistance/guidance through online tutoring sessions provided by AssignmentHelp.Net is to help and enable students to compete academically. The website does not provide ghostwriting services and has ZERO TOLERANCE towards misuse of the services. In case any user is found misusing our services, the user's account will be immediately terminated.