Determine the flow rate of the refrigerant

Assignment Help Chemical Engineering

Reference no: EM131156453

Problem 6.37:

Figure 6-20 shows a two-stage refrigeration cycle with two evaporating temperatures, flash gas removal, and intercooling. The cycle operates using carbon dioxide as the refrigerant. The condenser (HE1) uses cooling water at 25 °C to produce saturated liquid (stream 2). One third of the mass flow rate at 2 is diverted to stream 3 with the remainder going into stream 5. Both evaporators (HE2 and HE3) produce saturated vapor. The flash gas separator (S1) removes all the vapor at the top (stream 8) and the liquid at the bottom (stream 7). The second stage HE3 removes heat at the rate of 100 W at - 40
°C. Both compressors increase the pressure of their respective incoming streams by the same factor and they both operate with an efficiency of 80%. This system must be capable of removing 100 kW of heat in evaporator HE2 at - 40 °C. Determine the flow rate of the refrigerant, the amount of work in the compressors, and the heat loads in all heat exchangers. Perform a second-law analysis and identify the unit that contributes most to the irreversible operation of this cycle. Finally, sketch a PH graph and show the states of all streams.

Reference no: EM131156453

Questions Cloud

Calculate the amount of work in the compressor : What is the minimum pressure that we must have at the exit of the compressor in order to achieve liquefaction?

Example of a positive and a negative externality : In 3- 4 paragraphs, give an example of a positive and a negative externality. Would a Coasean solution resolve the economic efficiency of the externalities you cite? Why or why not?

Range of choice you have in radio stations : How do you feel this has impacted the range of choice you have in radio stations? Did government deregulation cause the creation of monopolies? Why or why not? How are natural market forces and other economic factors changing or not changing your ..

What types of waste are considered universal : What are the characteristics and parameters of Characteristic Hazardous Waste? When is a container more than 119 gallons considered empty? What about a 55 gallon drum? Describe waste stream management in terms of the process steps.

Determine the flow rate of the refrigerant : Determine the flow rate of the refrigerant, the amount of work in the compressors, and the heat loads in all heat exchangers.

Monopolist and a single firm in an identical : Illustrate graphically and compare the profit to be gained by a monopolist and a single firm in an identical perfectly competitive industry by developing an identical cost-saving innovation.

Key principles of the health security act : Explain the six (6) key principles of the Health Security Act. Must be in APA format with references

Analyze the history of changes in gdp : Analyze the history of changes in GDP, savings, investment, real interest rates, and unemployment and compare to forecast for the next five years. Discuss how government policies can influence economic growth.

Evaluation of the technical feasibility of the reform plan : Write an impartial evaluation of the technical feasibility of the Reform Plan including cost factors and its impact on the existing medical system including insurers, medical facilities, practitioners, and patients

User Account

All Pages