


Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
A university assignment from spring 2005, where students are required to review class notes and perform calculations related to energy expenses and conversions for industrial processes. The tasks include determining total energy expenses for electrical energy and lp gas, calculating energy conversions for fuel oil, liquid propane gas, water, and coal, and comparing the costs of using electric and natural gas water heaters.
Typology: Assignments
1 / 4
This page cannot be seen from the preview
Don't miss anything!
Spring 2005 Assignment #
Review material covered in the class notes.
l. A 219,000 sq. Ft. Facility that makes air-conditioning components used 2.1 million kWh last
a. Total electrical energy expense b. Total LP Gas energy expense c. ECI d. EUI
d. At what cost per^ kWh do these two opJibls become equally attractive? I 4'. A train is carrying 400 tons of coal. If iach ton of coal will generate 2,A00 kWh of electrical
a. What is the annual coal consumption? ' (^) b. How many kWh are produced (^) daily? Annually? (assume (^365) days/yr.) c. What is the overall efficiency of the power plant?
d. If 70'F water is used to tecover waste heat and produce 105'F "hot" water for residential customers. On any given^ day, how (^) mdny gallons^ of "hot" water will be produced?
Spring 2005 Assignment #
Review material covered in the class notes.
at a cost of (^) $0.045/kWh, including (^) taxes. They also used 7,000 gallons (^) of LP gas (^) at a cost of $O.42ltherm, including^ taxes. Determine:
Total LP (^) Gas Energy: 7,000 gal (^) LP/yr *^ 95^000 Btu/l :S?-J-f3JT
2,458,478 kWh to MMBtus (^) =
2,145,513 (^) kWh to therms of natural gas (^) =
gal (^) LP *^1 therm/i00.000 Btu *^ $0.42ithei'rn
c.
d.
s.
f. 150 tons of coal to kWh (^) =
b. How many kWh are produced^ daily? Annually? (assume^ 365 days/yr.)
Daily kWh: 35,040.000 kWhlyr *^ 1yr665 days :
AnnualkWh: (^) 5a : ffi
c. What is the^ overall efficiency of the power plant?
':, Heat Rate :^ 8,500 Btu/kWh
Efhiiencl.' :^100 / (^) [8.500 Btu/k\ih *^ lkwhl3,4l2 Btu (^) ] :^ miru
d. If 70'F water is used to recover (^) waste heat and produce 105"F "hof'water for residential customers. On any given day,.how many gallons of "hot" water will (^) be produced?
Waste Heat (^) - 2.978*l0tr Btrvyr - (^) [35.040,000 kWh/yr +'J^4l2BfillkWh^ ]
= 1.782+ 10" Btu/vr = ;L78.
#gaisl,.,ater:i.782ti0rrBtu/yr(1 Bru/l lb-"F)11{i05"F-?0"F)1igal/8.341b)(l,vr/-a65da.v}