联系方式

  • QQ:99515681
  • 邮箱:99515681@qq.com
  • 工作时间:8:00-21:00
  • 微信:codinghelp

您当前位置:首页 >> Java编程Java编程

日期:2020-11-05 11:27

MECE E3301 Thermodynamics: Homework 4

Problem 1: Ideal gas is confined to a volume of Vi within a piston-cylinder assembly

at a pressure of pi

. The piston-cylinder assembly is well-insulated. The gas is allowed to

expand to a volume Vf in two ways: (1) reversibly, and (2) suddenly and irreversiibly. The

pressure at the final state in both cases is larger than the pressure in the surroundings,

p0. Answer the following questions:

1. Find the work done in the reversible process

2. Find the work done in the irreversible/sudden process

3. Find the pressure at the final state in the two processes described here.

4. Show that the pressure at the end of the reversible process is always less than the

pressure at the end of the irreversible process.

Problem 2: Hot combustion gases, modeled as air behaving as an ideal gas, enter a

turbine at 10 bar, 1500 K and exit at 1.97 bar and 900 K. The mass flow rate is 0.1 kg/s.

If the power output of the turbine is 55.4 kW, determine the rate of heat transfer from the

turbine to its surroundings, in kW. You’ll have to use the first law of thermodynamics for

control volumes. Of course, you’ll have to define/choose an appropriate control volume.

This is problem 4.36 from M & S, 9th ed. The mass flow rate is not given in the problem

(an omission).

Problem 3 You’ll have to apply the conservation of mass for a control volume. As

in the previous problem, you’ll have to define/choose an appropriate control volume.

Problem 4 You’ll have to use the first law of thermodynamics for control volumes.

As in the previous problem, you’ll have to define/choose an appropriate control volume.

1

2


版权所有:编程辅导网 2021 All Rights Reserved 联系方式:QQ:99515681 微信:codinghelp 电子信箱:99515681@qq.com
免责声明:本站部分内容从网络整理而来,只供参考!如有版权问题可联系本站删除。 站长地图

python代写
微信客服:codinghelp