Question

The pressure of a motor operating according to the seilinger cycle is 1.01x10 ^ 5 Pa at the start of compression, the pressure and temperature at the end of the heat socket are 43,05x10 ^ 5 Pa and 2410 K, respectively. The temperature at the end of the expansion is 1150 K. Since the compression ratio of this engine is 11, find the average index pressure by taking the adiabatic base coefficient of 1.41.

Answer #1

The pressure of the 4-stroke engine operating according to the
seilinger cycle at the end of the heat input is 97.45x10 ^ 5 Pa at
the beginning of the heat input 600 ° C. The compression ratio of
the cycle is 17.5 burst (pressure) ratio 1.7, the cutting
(pre-expansion) ratio 1.6 and taking the adiobatic base value of
1.4; What is the temperature at the end of expansion?

The pressure at the end of the ist input of a 4-stroke engine
operating according to the Selinger Cycle is 97.45x10 Pa, and the
temperature at the start of the heat input is 600 ° C. The
compression ratio of the cycle is 17.5 and the blast (pressure)
ratio is 1.7. Which of the following is the temperature at the end
of the expansion by taking the cut (ten expansion) ratio 1.6 and
the adiabatic ús value 1.4?

An ideal Diesel cycle has a cut off ratio of 2. The
temperature of the air at the beginning and
at the end of the compression process are 300 K and 900 K
respectively. By utilizing constant
specific heats, taking the specific heat ratio, k = 1.4, Cp = 1.005
kJ/kg K and Cv = 0.718 kJ/kg
K. Determine the followings:
(i) The compression ratio. [5 marks]
(ii) The maximum cycle temperature. [5 marks]
(iii) The amount of heat transferred...

1) An air-standard Otto cycle has a compression ratio of 9. At
the beginning of the compression process, the temperature is 20°C,
and the pressure is 100 kPa. The heat added is 500 kJ/kg. Determine
the cycle efficiency, work output, and the heat rejected
2) An air-standard Otto cycle operates with a minimum
temperature of 300 K and a maximum temperature of 1700 K. The
compression ratio of the cycle is 7. At the beginning of the
compression process, the...

An inventor proposes a four-stroke cycle running on helium. The
engine has a compression ratio of 8 and maximum operating
temperature of 1,500 K. The atmospheric
conditions are temperature of 300 K and pressure of 100 kPa. The
processes can be approximated as below:
1- 2 isentropic compression
2- 3 constant volume heat addition
3- 4 isentropic expansion
4- 1 constant pressure heat removal
a. Plot P-v and T-s diagrams for this cycle.
b. Determine state conditions at the end...

1. An engine operating at a hot-air standard (k=1.35) Dual
Combustion Cycle handles air at 100kPa, 34.5°C, & 0.3531m^3
during the beginning of the isentropic compression process. The
engine has a percent clearance of 6.25% and an expansion ratio of
1.5 during the isentropic expansion process. It receives 165 kJ of
heat during the constant volume process. What is the a.)
Temperatures at different points of the cycle °C? b.) Net Work kJ?
And c.) Mean effective pressure in kPa?

1. The compression ratio of an air powered diesel cycle is A = 18 and the cutting ratio is B = 2.2. The pressure of the air at the beginning of the compression process is C = 94 kPa and the temperature is D = 32 ° C. Considering that the specific temperatures change with temperature (using the air standard, not the cold air standard only, that is, using the relative specific volumes from the table) and accepting the gas...

A refrigerator using Helium Gas operates on a reversed Brayton
Cycle with a pressure ratio of 5. Prior to compression the gas
occupies 100cm3 at a pressure of 150kPa and a temperature of
-23degC. The volume at the end of the expansion is 80cm3. What is
the refrigerators CoP and its power input if it operates at 60
cycles per second ?

A Diesel cycle engine is analyzed using the cold air
standard method. Given the conditions at state 1, compression ratio
(r), and cutoff ratio (rc) determine the efficiency and other
values listed below.
Note: The specific heat ratio and gas constant for air
are given as k=1.4 and R=0.287 kJ/kg-K respectively.
Given Values
T1 (K) = 326
P1 (kPa) = 105
r = 16.5
rc = 1.8
a) Determine the specific internal energy (kJ/kg) at state
1.
b) Determine the...

1. a) Suppose 2 moles of a monatomic ideal gas
occupies 5 m3 at a pressure of 1600 Pa.
First: Find the temperature of the gas in Kelvin.
Answer: 481 K
Second: Find the total internal energy of the gas.
Answer:12000 J
1. b) Suppose the gas undergoes an isobaric
expansion to a volume of 7 m3.
(Don’t forget to include + and – in each of the
problems below)
First: Find Q
Answer: 8000 J
Second: Find W
Answer:...

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