Preview

Energy Management

Satisfactory Essays
Open Document
Open Document
307 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Energy Management
Energy Management H.W 1

1. A hospital is considering the purchase of a large commercial laundry dryer, and is attempting to decide between an electric and natural gas powered system. If electricity costs $0.06/kWh and is used with an efficiency of 90%, what is the equivalent price of natural gas per therm if it can be burned with an efficiency of 80%?

Dimensional Analysis

|$.06 |29.3 KWh |.8 efficiency |
|.90 efficiency |1 therm | |

= 1.5626 = $1.56/ therm

2. A new lighting system will save $25,000 per year for 8 years. How much would a company pay for this device if the interest rate (discount rate) is 15%?

Using[pic], and then solve for P, A =200km r= 15%, t = 8, n=1

P= $65,380.35

3. Which is the simplest method of calculating the economic benefit of an energy saving investment? When is/isn’t this method not recommended?

Simple Payback Period just like the name implies this is best for 1 or 2 year investments. If investment period goes over then should consider another method.

4. A 250,000 sq ft manufacturing facility has annual energy usage of 2.5 million kWh of electricity and 10 million cu ft of natural gas usage in one year. The cost of electricity is $0.10/kWh and the total natural gas bill is $180,000/yr.

a. Calculate the Energy Use Index.

b. Calculate the Energy Cost Index.

A) EUI = 10 million, 1ft3 = 1000 Btu = 10 X 103 MMBtu

2.5 million KWh, = 1kWh= 3,412 Btu = 8.53 X 103 MMBtu

= (10+8.53) X 103 MMBtu/ 250k sq feet = 74,210 Btu/ft2/yr

B) ECI= 2.5 million KWh X .10 KWh = 250k

Total Natural gas bill = 180k

= (250+180)K/ 250K sq feet = 1.72/sq

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Gm533 Week 7 Discussion

    • 524 Words
    • 3 Pages

    turned on and the numbers of times his electric clothes dryer (DRYER) was operated. His objective was to relate the KWH consumption to the AC and DRYER usage. In addition, he…

    • 524 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    2) 84% of all commercial energy used in U.S. is wasted (costs an average of $570,000 per minute)…

    • 799 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Distrigas Corporation

    • 1217 Words
    • 5 Pages

    Q1. As per the provided information the Gas Utility companies pays a base commodity charge of $.3359 plus a peak usage demand of charge that is $4.63 per Mcf multiplied by the total demand during the maximum take day in the last 12 months which is 240 in this case. The cost per MCF can be derived by the below formula…

    • 1217 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    M&a Practice Question

    • 901 Words
    • 4 Pages

    2. How much would $5,000 due in 25 years be worth today if the discount rate were 5.5%?…

    • 901 Words
    • 4 Pages
    Satisfactory Essays
  • Powerful Essays

    Sanyal, S, K, Morrow, J, W, Butler, S, J, and Tait, A, R, ‘Cost of Electricity from Enhanced…

    • 1465 Words
    • 12 Pages
    Powerful Essays
  • Powerful Essays

    ENGR101. You may hand write the answers; there will be no extra marks for a wordprocessed answer. There is no need to write a full report, but your working and answers must…

    • 1241 Words
    • 5 Pages
    Powerful Essays
  • Satisfactory Essays

    Energy Balance Case Study

    • 733 Words
    • 3 Pages

    This assignment will give you the opportunity to apply some of the principles discussed about Energy Balance. Please provide detail in your answers. Be sure to show your work.…

    • 733 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    energy plannin proposal

    • 340 Words
    • 2 Pages

    Stockton, California, with its 400,000 plus residents requires 3,000 megawatts of energy monthly. The first initial budget for this year is ten billion dollars, with a budget of one billion for each following year. Therefore it is crucial that the city invest in less expensive, renewable energy sources for future consumption. It must be kept in mind that the city will expand and the population will continue to rise, therefore energy consumption will increase along with the populace. The following is a breakdown of the energy resources Stockton will use.…

    • 340 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Time Value of Money

    • 705 Words
    • 3 Pages

    4. If you were going to buy your office from Mrs. Beach for $500,000 with a 10% down payment, 15 years financing with a 6% interest rate, how much would your payments be each month?…

    • 705 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Assignment Ch05

    • 2745 Words
    • 25 Pages

    The machinery rate was computed as $15,400 divided by 308 practical capacity hours, which equals $50 per hour. The energy costs of $4,000 per month will be added to the $15,400 monthly machinery costs,…

    • 2745 Words
    • 25 Pages
    Good Essays
  • Good Essays

    Energy Planning Proposal

    • 1091 Words
    • 5 Pages

    Background of Request: The stakeholders are people who are interested in making money to benefit the company. In Seattle, everyone likes to complain about how hot it gets in the summer and how cold it gets in the winter. And we laugh at how the rest of the country thinks that it rains all the time here, right up until November, when it is raining all the time. But what does that mean for energy efficiency? The basis for this Alternative Energy Plan is to ensure that the City of Seattle can resolve the issues of cost, safety, efficiency and conservation.…

    • 1091 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    b The electrical energy you calculated in a passes to the water pump. The efficiency of the water pump is 0.80 (80%).…

    • 260 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Holding plant size constant at 150,000 kilowatts, determine the short-run 
average variable cost and marginal cost functions for electricity generation.…

    • 510 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Energy Management

    • 7643 Words
    • 31 Pages

    Management is a process involving planning, directing and controlling the various activities to maximize the productivity. In the same context Energy Management is the science involving planning, directing and controlling the supply and consumption of energy to maximize productivity and comforts and minimize the energy cost and pollution with conscious, judicious and efficient use of energy. The basic objective of energy management function is to see that energy needs of the various organisations are satisfactorily met at minimum cost at present and in future to extend possible. Strong commitment from top management is essential for a successful energy management program which includes managerial decision making. However, managing energy does not necessarily require a formal system; by following simple techniques any firm can improve their enrgy consumption performance. Energy strategy spans a number of the key functions within a firm and therefore requires cooperation and commitment from all. Senior management provide the leadership and set direction; finance are involved to ensure that most appropriate purchasing decisions are made; production, as the key user, ensures that energy is used appropriately; engineering ensure that plant is operated and maintained efficiently and HR are involved to facilitate training and help generate a culture of energy awareness.…

    • 7643 Words
    • 31 Pages
    Powerful Essays
  • Satisfactory Essays

    How to Save Energy

    • 415 Words
    • 2 Pages

    The term “phantom load” refers to the energy that an appliance or electronic device consumes when it is not actually turned on. According to the U.S. Department of Energy (DOE), “In the average home, 75 percent of the electricity used to power home electronics is consumed while the products are turned off.” A report from the University of California Berkeley says that phantom loads account for about 6 percent of all national residential electricity consumption. You can eliminate phantom loads by unplugging appliances and electronics when you are not using them, or by plugging them into a power strip, and turning the strip off when they are not in use. For more information, see Save Energy, Eliminate Phantom Loads.…

    • 415 Words
    • 2 Pages
    Satisfactory Essays