# Thermodynamics compressor Question

• Jason Brooks
In summary, the given conversation discusses the parameters of air entering a compressor at a steady state and exiting with a specific pressure, temperature, and velocity. It also poses questions about the exit temperature, size of the exit pipe, and the isentropic efficiency of the compressor. The process is described by the equation pv^1.34= constant. Part 1 prompts a discussion about the relationship between temperature and pressure in a polytropic process for an ideal gas, while Part 2 raises the question of the mass flow rate of air entering and leaving the compressor.
Jason Brooks

## Homework Statement

Air enters a compressor operating at a steady state with a pressure of 14.7 psi, a temperature of 70 F , and a volumetric flow rate of 500 ft^3/min. The air velocity in the exit pipe is 700ft/s and the exit pressure is 120 psi. If each unit mass of air passing from the inlet to the exit undergoes a process described by pv^1.34= constant determine the exit temperature on F and the diameter of the exit pipe in inches. What is the isentropic efficiency of the compressor?

## The Attempt at a Solution

Jason, Welcome to the PF, but do NOT post multiple threads with the same question in other forums. I've deleted the two other copies of this question, and left this one here in the homework forum where it belongs. You are also receiving a warning via the PF warning system.

You also need to show your work so far in order for us to help you (PF rules).

I moved this thread to the Intro Physics homework forum where it will probably get more looks. Jason -- you still need to post some work for us to help you.

Part 1: What can you say about relationships between temperature and pressure in a polytropic process for an ideal gas?

Part 2: What can you say about the mass flow rate of air entering and leaving the compressor?

## What is a thermodynamics compressor?

A thermodynamics compressor is a mechanical device that increases the pressure and temperature of a gas by reducing its volume. It is commonly used in refrigeration and air conditioning systems.

## How does a thermodynamics compressor work?

A thermodynamics compressor works by using a piston or rotating impeller to compress a gas, which increases its temperature and pressure. This compressed gas is then sent to a condenser where it is cooled and condensed into a liquid.

## What are the different types of thermodynamics compressors?

There are several types of thermodynamics compressors, including reciprocating, rotary, centrifugal, and scroll compressors. Each type has its own unique design and operating principles.

## What are the main components of a thermodynamics compressor?

The main components of a thermodynamics compressor include a compressor motor, compressor housing, suction and discharge ports, valves, and a lubrication system. Some compressors may also have additional components such as an economizer or intercooler.

## What are the applications of thermodynamics compressors?

Thermodynamics compressors are used in a wide range of applications, including air conditioning, refrigeration, gas and oil processing, chemical plants, and power generation. They are also used in various industrial processes such as food and beverage production, pharmaceuticals, and manufacturing.

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