Unit 6 Assessment 5901

1. A dry refuse derived fuel contains 50% rubber, 10% ferrous metals, and 40% dirt (by weight). Approximately, what is the heat value of the waste stream?

2. 20 gram sample of refuse derived fuel has a heat capacity of 13,000 cal/°C and a heat value of 2800 cal/g. What temperature rise is expected when the sample is combusted in a calorimeter?

3.__________ is expressed in common units and is pictured as quantity that flows.

4. What is an energy balance for heat energy in terms of the conversion of water to steam?

5.  A refuse derived fuel consists of 50% rubber, 10% ferrous metals, and 40% dirt on a wet weight basis. Approximately, what is the heat value?

6.  A refuse derived fuel power plant discharges 1.2 m³/s of cooling water at 75°C into a river. The river flows at 23 m³/s, and its temperature is 15° C upstream of the plant. What will be the river temperature immediately downstream of the discharge?

7. The combustion of fuel such as RDF can have undesirable side effects including all of the following EXCEPT:

8.  __________ uses the chemical makeup of fuel in order to approximate its heat value.

9. What is the heat value for a 15 gram sample of refuse-derived fuel that is combusted in a calorimeter having a heat capacity of 10,500 calories/° C? The temperature rise is measured as 7°C.

10. __________ is the method of determining the heat value of mixed fuels.

11.  How does gasification technology work? What are its advantages and disadvantages?

Your response should be at least 200 words in length.

12. Combustion produces several undesirable effects. Which do you see as the worst, and why?

Your response should be at least 200 words in length.

Worrell, W. A., &Vesilind, P. A. (2012).Solid waste engineering (2nd ed.). Stamford, CT: Cengage Learning.