ENG316 Mechanism description: The refrigeration cycle

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Description

Rewrite your earlier mechanism report (Assignment 4), making the necessary adjustments for format and content. If necessary, tighten up (condense) or expand on the appliance information. Review the clarity and brevity of content and correct editorial issues. Read the mechanism report example in the textbook if you have not done so already. The document must include:

a. Headings

b. Graphics

c. A logical spatial order

d. A citation of any graphic(s) if taken from a source


In your document, you should:
  1. Ensure the document is clear and brief.
  2. Exercise logic in design, including placement of headers and graphics.
  3. Use appropriate language for the audience and purpose.
  4. Follow the steps identified in the textbook.
  5. Cite source(s), including any graphics.

Your assignment must follow these formatting requirements:
  • Be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides; references must follow APA or school-specific format. Check with your professor for any additional instructions.
  • Include a cover page containing the title of the assignment, the student’s name, the professor’s name, the course title, and the date. The cover page and the reference page are not included in the required page length.

Professor's Feedback:

Introduction - Remember that your audience is a 5th-grade science class. Choose one fridge and label the parts.

Component - Each of these parts need labeled in your graphic, then need their own section where you explain the part and its function. These need listed in the introduction.

Working Principle - You may be able to use some of this information when you separate the parts above!

References - Hanging indent needed.

Unformatted Attachment Preview

Running Head: MECHANISM DESCRIPTION – REFRIGERATOR MECHANISM DESCRIPTION- REFRIGERATOR 1 MECHANISM DESCRIPTION – REFRIGERATOR 2 Introduction A refrigerator, also known as a fridge, is one of the most common household appliances. It can be thought of as a large container that is used to preserve beverages, food or even vaccines. A freezer which is often built into a refrigerator system functions similar to a refrigerator. It maintains temperatures below the freezing point of water. Modern refrigerators are pumped by electricity. It works on the principle of heat exchange where the fridge components made of alloy, aluminum or copper transfer heat from inside the fridge to the external environment keeping the inside of the refrigerator cool below room temperature. Fig 1: Refrigerator (Rees, 2015) Fig 2: Refrigerator with freezer in top compartment (Rees, 2015) Purpose The basic concept behind refrigeration is to slow down the activity of bacteria present in the food thus allowing the food to stay fresh longer. A refrigerator keeps the food cold slowing down the reproduction rate of bacteria and thus reducing the rate of decomposition. Freezing the MECHANISM DESCRIPTION – REFRIGERATOR 3 food stops the bacterial activity altogether allowing the food to last for months (Belman-Flores et al. 2015). Components There are five components in a refrigeration cycle: the condenser, the fluid refrigerant, the evaporator, expansion valve, and the compressor. The fluid coolant is Freon. This is a gas that undergoes the refrigeration cycle where it flows through various parts of the fridge system undergoing multiple phase transitions. The evaporator consists of aluminum and copper tubing. It removes unwanted heat from food or products stored in the fridge through fluid refrigerants. The compressor converts vapor to high temperatures allowing heat to be released. This provides the power to transmit heat from regions of low temperature to high-temperature spaces. The expansion valve is a device that suddenly reduces the pressure and temperature of Freon. The condenser is a device that absorbs heat from the refrigerant and disposes this to the atmosphere. Working Principle Various parts of a fridge system work together to achieve preservation by removing heat from a specific region and disposing to another. Often, gases cool down when allowed to expand and heat up when compressed (Belman-Flores et al. 2015). The basic principle behind the system`s functioning is that when items of varying temperatures are close, the more cooling surface attracts heat warming up while the hotter surface loses heat cooling down. The refrigerant also known as a coolant alternates between a cool liquid and a hot gas. In its liquid state, it passes through an expansion valve. The liquid undergoes a sudden drop in pressure which converts it to a cool gas. The gas flows through the fridge cabinet absorbing heat from the items stored before vaporizing (Rees, 2015). It then flows into the compressor that MECHANISM DESCRIPTION – REFRIGERATOR 4 constricts it to a high-pressure hot gas. The hot gas flows to the condenser that consists radiator coils that dissipate the heat to the external environment. This cools the gas condensing it back to the liquid state. The liquid flows back to the expansion valve that converts it back to cool gas, and the cycle repeats itself. MECHANISM DESCRIPTION – REFRIGERATOR 5 References Belman-Flores, J. M., Barroso-Maldonado, J. M., Rodríguez-Muñoz, A. P., & Camacho-Vázquez, G. (2015). handbook of domestic refrigeration, approaching a sustainable refrigerator–a review, 51, 955-968. Rees, J. (2015). Refrigerator. Bloomsbury Publishing USA.
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Explanation & Answer

Attached.

Running head: INFORMATION REPORT

1

Information Report
Name
Institution

INFORMATION REPORT

2
Information Report
A Refrigerator

A refrigerator is a common household appliance consisting of a heat pump and a
thermally insulated section that transfers heat from the internal region to the external
environment with a purpose of cooling the inner region below the room temperature. In most
cases, it is mostly described as a fridge, though the term is considered to be a colloquial name. A
refrigerator is used as a method of food storage among people of middle and high class. The low
temperature tends to reduce the reproduction of bacteria; therefore, a refrigerator is said to
reduce the rate at which bacteria grow that reducing food spoilage. The appliance maintains a
temperature that is slightly above the water freezing point. However, some refrigerators have a
section that keeps temperatures that are below the freezing point, which is known as a freezer.
The introduction of refrigerators...


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