Homework 10 / Due: Wednesday 7 December 2005
Moving Freight and People
Dear Consultant:
Freight transportation is often overlooked, yet it is crucial to a society’s quality of life. In this HW, you are asked to demonstrate your ability to analyze various aspects of the shipment of goods.
Please complete the exercises below completely and clearly. You may submit your assignment as a member of a group of CE361 students not to exceed four in size. Signatures of all group members must appear on the top page of the work submitted.
1. (20 points) Trade Between Countries – Cheese and Cell Phones. Repeat FTE Example 12.1, but with the data contained in the table below.
Country E / Country APopulation / 322,000 / 300,000
Cheese Consumption / 48.5 lbs/person per year / 38.2 lbs per person per year
Cost to produce cheese / $15.30 per 40-lb block / $14.20 per 40-lb block
Cell phone purchases / 0.124 per person per year / 0.120 per person per year
Cost to produce cell phones / $133 per unit / $166 per unit
It costs $9.90/cwt to ship cheese and $119/cwt to ship cell phones. Although each cell phone weighs less than 8 oz., each cell phone is shipped in a 5-lb box. How much will the consumers of each country save by importing the good with the lower production cost? What is the maximum logical tariff that each country could apply to the imported product?
2. Rail locomotive power. Uwanna Railroad currently serves Shoridan (FTE Figure 1.3) with a rail line that goes through Mythaca. Uwanna RR wants to construct a spur line to serve some new industries in Mazurka. For years, Uwanna RR has achieved operational savings in the Mythaca region by using a standard consist of two 5800-HP locomotives pulling 100 container cars at 90 percent efficiency. Each locomotive offers 1250 lbs resistance. Each car has four axles, weighs 64,000 lbs unloaded, and carries two containers that each weigh 53,000 lbs loaded.
A. (10 points) In the absence of any ruling grade or horizontal curve, at what speed can the standard consist operate?
B. (5 points) At V = 35 mph, what is the maximum ruling grade that the standard consist can climb?
C. (5 points) At V = 35 mph with G = 0, what is the most severe horizontal curve that the standard consist can negotiate?
3. (20 points) Horsepower for 3x2 tow. FTE Exercise 12.16 with an engine/propeller system that is 65 percent efficient.
4. (20 points) Energy Intensity of freight movement. Coal for Mythaca’s oldest power plant comes from the other side of Murdoch Bay, an “airline distance” of 144 miles. The actual distance from the coal source to the power plant is 183 miles by rail, 177 miles by truck, and 160 miles by barge. Although other considerations go into the choice of mode, the power plant operators want to know how much energy is expended for each 1000 tons of coal delivered to the power plant by each mode. Use the Year 2000 EI values in FTE Table 12.16 and assume the backhaul is empty for each mode. The backhaul EI values with respect to their loaded EI values are 70 percent for rail, 60 percent for truck, and 50 percent for barge.
5. (20 points) Energy Intensity of passenger travel. FTE Exercise 13.3. Parts (a) and (b) = 5 points each. Part (c) = 10 points.