Other
Vapour power cycle
- Institution
- Mangosuthu University Of Technology (MUT)
Tutorial questions based on the application of vapour power cycle
[Show more]
Seller
Follow
Content preview
UMLAZI KWAZULU-NATALP.O. Box 1263 Jacobs 4026 Durban Tell: 031 907 7111 Fax: 031 907 2892
THERMODYNAMICS APPLIED III: TUTORIAL #3
VAPOUR POWER CYCLE
1.
# Location pressure Quality/temp. velocity
1 Inlet to turbine 6 MPa (60 bar) 380 °C -
2 Exit from turbine or inlet to condenser 10 kPa (0.1 bar) 0.9 200 m/s
3 Exit from condenser or inlet to pump 9 kPa (0.09 bar) Saturated liquid -
4 Exit from pump or inlet to boiler 7 MPa (70 bar) - -
5 Exit from boiler 6.5 MPa (65 bar) 400 °C -
Note: The rate of steam flow is 1000 kg/hr.
Calculate:
a) The power output of the turbine,
b) Heat transfer per hour in the condenser and reboiler separately
c) The mass of cooling water circulated per hour. Choose the inlet temperature of cooling water
of 20 °C and 30 °C at the exit from the condenser.
d) The diameter of the pipe connecting the turbine and condenser.
2. In a steam power cycle, the steam supply is at 15 bar and dry and saturated. The condenser pressure
is 0.4 bar. Calculate the Carnot and Rankine efficiencies of the cycle. Neglect pump work.
3. In a steam turbine steam at 20 bar, 360°C is expanded to 0.08 bar. It then enters a condenser, where
it is condensed to saturated liquid water. The pump feeds back the water into the boiler. Assume
ideal processes, find per kg of steam the net work and the cycle efficiency.
4. A Rankine cycle operates between pressures of 80 bar and 0.1 bar. The maximum cycle temperature
is 600°C. If the steam turbine and condensate pump efficiencies are 0.9 and 0.8 respectively,
calculate the specific work and thermal efficiency. Relevant steam table extract is given below.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller cebohmungwe. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R163,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
51036 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 15 years now