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Spring 2005 Assignment: Industrial Energy Expenses & Conversions, Assignments of Engineering

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

Pre 2010

Uploaded on 10/12/2009

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EIN 4321
Spring 2005
Assignment #2
Due: January 26,2406
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
yem at a cost of $0.0451kWh, includingta>(es. They also used 7,000 gallons of LP gas at a
cost of $O.42ltherm, including taxes. Determine:
a. Total electrical energy expense
b. Total LP Gas energy expense
c. ECI
d. EUI
2. Perform the followin$ calculations:
a. 5,000 gallons #2 fuel oil to Btus
b. 1,257 gallons liquid propaire gas to MMBtus
g. 2,458,478 kWhto MMBtus
d: 2,145,513 kwh to therms of natural gas
e. 16 Barrels of crude oil to kWh
, f. 150 tons of coal to kWh
3. Inland Containers, a cardboard manufacturing facility uses 4,750 kgal of water annually for
glue on their comrgated cardboard products.
a. How many Btus are required to heat the water from 75oF to 140"F?
b. They are using an 85% efficiency gas heater and natural gas can be purchased for
$O.45ltherm. What is the annual cost to run the heater?
c: The operations manager is considering purchasing an electric water heater. Inland
Containers currently pays $0.04/kwh. Should they purchase the electric heater or stay w/
the gas heater? Show justification.
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
energy, how many kWh can-be generated from the entire load of coal?
5. The Power Plant at Florida's Natural Orange Juice facility is rated at 4 MW and has a heat
rate of 8,500 Btu/kWh.
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?
[Read: How many kWh are produced per Btu?]
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?
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EIN 4321

Spring 2005 Assignment #

Due: January 26,

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

yem at a cost of $0.0451kWh, includingta>(es. They also used 7,000 gallons of LP gas at a

cost of $O.42ltherm, including taxes. Determine:

a. Total electrical energy expense b. Total LP Gas energy expense c. ECI d. EUI

  1. Perform the followin$ calculations: a. 5,000 gallons #2 (^) fuel oil to Btus b. 1,257 gallons^ liquid propaire gas to MMBtus g. (^) 2,458,478 kWhto MMBtus d: 2,145,513 kwh to therms of natural gas e. 16 Barrels of crude oil to kWh , f.^150 tons^ of^ coal^ to^ kWh
  2. Inland Containers, a cardboard manufacturing facility uses 4,750 kgal of water annually for glue on their comrgated cardboard products. a. How many Btus are required to heat the water from 75oF to 140"F? b. They are using an 85% (^) efficiency gas (^) heater and natural gas (^) can be purchased (^) for $O.45ltherm. What is the annual cost to run the heater? c: The operations (^) manager is considering purchasing (^) an electric water heater. Inland

Containers currently pays $0.04/kwh. Should they purchase the electric heater or stay w/

the gas^ heater? Show justification.

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

energy, how many kWh can-be generated from the entire load of coal?

  1. The Power Plant (^) at Florida's Natural Orange Juice facility is rated at 4 MW and has a heat

rate of 8,500 Btu/kWh.

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?

[Read: How^ many^ kWh^ are^ produced per^ Btu?]

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?

EIN 4321

Spring 2005 Assignment #

Due: January 26,

KEY SOI,UTTONS

Review material covered in the class notes.

I. A 219,000 sq. Ft. Facility that makes air-conditioning componehts used 2. I million kWh last year

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:

ri. Total electrical energy expense

Total Electric Energy :^ 3,100,000kWh/yr t^ $0.045,&Wh flg4JTS'/G

b. Total LP Gas energy expense

Total LP (^) Gas Energy: 7,000 gal (^) LP/yr *^ 95^000 Btu/l :S?-J-f3JT

c. ECI

ECI :^ [$9a.500/yr +^ $2.793 lyrl I 219,000 ft2 :

d. EUI

EUI :^ SUM All Annual Btu's / Total ft2 of AC Soace

: 7,830 Ml\4Bt#yri 2i9"000 112 : f5'ETtffi;;

Perform the following calculations:

a. 5,000 gallons #2 fuel oil to Btus :

b. 1,257 gallons liquid propane gas to MMBtus : fitEffiB?

2,458,478 kWh to MMBtus (^) =

2,145,513 (^) kWh to therms of natural gas (^) =

16 Barrels of crude oil to kWh :^ ffiId'EFil

gal (^) LP *^1 therm/i00.000 Btu *^ $0.42ithei'rn

$ofTifr'?;;

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?

[Read: How^ many^ kWh^ are^ produced per^ Btu?]

':, 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}

ater