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How is a Microwave Built? Microwaves have taken convenience for the home to a whole new level. They can be positioned in the wall cabinets or on the top of kitchen islands. They are also constructed from a variety of materials. The cavity magnetron tube emitting microwaves was first developed in 1940 at Birmingham University in England. Percy Spencer discovered that this device can heat food after he watched corn pop, and eggs cook. Raw Materials Microwave (MW) heating is becoming popular in the field of material processing because of its inherent advantages like speedier heating and uniform heating. Its non-contact nature, low energy consumption, and quicker heating are other advantages. Heating with MW is used in different engineering materials, including ceramics, metals, polymers and composites. Recently, it has also been modified for bulk metal joining, the cladding of metallic powders that are not similar on metallic substrates, as well as casting. Metal is the main material used in microwave ovens. It is mined from the earth using processes that consume lots of energy and emit greenhouse gases. The second major material is plastic, which comes from organic substances that are natural such as crude oil and cellulose. Plastic production generates indirect greenhouse gases through the use fossil fuels for electricity and heat, as well as direct emissions from chemical processing such as the production Bisphenol A and phthalates. After the raw materials are procured, they go through rigorous manufacturing and quality controls to ensure that they meet the strict federal regulations. During this process, a wide range of waste and emissions are produced, including oils, solvents dust, fumes and dust. The final product is shipped to retailers, and then to consumers. The majority of microwaves are shipped via truck. This consumes a lot of energy, and creates greenhouse gases. After the microwave is purchased, it is typically used for a few years before it becomes obsolete and being discarded. Microwaves last a limited time therefore recycling and end-of life disposal options are vital to reduce the amount of waste and emissions. Design Microwave ovens cook food by emitting microwave radiation an electromagnetic form that is non-ionizing waves that have frequencies in the microwave region of the electromagnetic spectrum (300 MHz to 300 GHz). The microwave oven cooks food by passing the radiation through it. Microwave ovens have been designed to shield the user from harmful effects of the radiation. This involves arcing, which could harm the oven as well as the food inside. There are many different types of microwavable ovens that are available. Each has its own pros and cons. When choosing a microwave, consider the kitchen size and the size that will meet your cooking needs. For instance, if you have a small counter space, consider a built-in model that tucks the appliance away. The process of designing microwaves begins with acquisition of raw materials, which are then processed to create the various parts of the oven. The oven's frame and cavity are two of them, as are the turntable, glass tray, and magnetron tube that includes transformer and capacitor. The casing is typically composed from metal, including galvanized steel, aluminum, or brass. After assembly the microwave is then tested and packaged for delivery. The packaging is typically comprised of recycled materials such as paper and cardboard or recyclable plastics such as acrylonitrile butadiene styrene polyethylene terephthalate or polyvinyl chloride. The new microwave is loaded onto transportation tools, such as aircrafts, ships or automobiles. These tools use fossil fuels to transform chemical energy into mechanical energy, which is used to move microwaves on their way to the consumers. After the microwaves are delivered to the customer, they can be plugged in by the user to be used. This is the energy-intensive phase in the lifecycle, and produces emissions such as carbon dioxide. Manufacture Microwaves are a popular appliance in modern kitchens. What makes a microwave work? Let's take a look at how to assemble this essential appliance in your home. The primary materials required to make microwave ovens include plastic components, metals, and other electrical parts. Some of these materials are found on the earth, but others require processing. The manufacturing process also requires energy consumption, resulting in the emission of greenhouse gases. This manufacturing stage is the main cause of the environmental impact of microwaves. During the manufacturing stage the majority of the material is assembled by automated machines. oven with microwave built in takes place in a factory where workers are placed on a conveyor. Workers use a machine for creating sheet metal into the outer casing and door. Once the frame is made, it is rinsed in an alkaline cleaner in order to remove oil and dirt. It is then assemble using bolts and screws to create a safe chassis for the inner cavity. When the chassis is built, the magnetron and other components are positioned. The magnetron emits microwaves that cause water molecules to heat up. In this phase there are a number of potential risks to your safety, for instance the risk of plasticizers leaking into food items and the possibility of the oven burning when it is empty. The microwave is then thoroughly tested and inspected once it is assembled to make sure it meets the standards of the federal government. After this step, the product is packaged for distribution to customers. The transportation of microwaves from the factory to retailers could be an environmental burden. The equipment used to transmit microwaves are powered by fossil fuels which release carbon dioxide and greenhouse gases into the air. Testing Microwaves are a type of electromagnetic radiation that forms part of the electromagnetic wave spectrum. The spectrum is comprised of different forms of energy that traverse space. These include radio waves, visible lights, infrared radiation, and ultraviolet radiation. Microwaves heat food by using the process of microwave heating. This uses electromagnetic radiation to cause the water molecules to vibrate and spin. This allows the food to heat without heating the air around it or altering its physical structure. Microwaving food is a safe method to heat food since the microwave radiation does not affect the food's cells, nor does it cause it to become radioactive. Microwaves should be avoided by those with pacemakers since they can interfere with electrical signals coming from certain electronic cardiac devices. This issue has been resolved by using special shielding. Some of the chemicals that are used in microwave ovens are harmful to health, such as bisphenol A (BPA) and phthalates. BPA has been proven to leach into food items from plastic containers, and phthalates can be linked to increased risk of reproductive problems. In addition microwave radiation can cause damage to the eye tissue and cause cataracts. In the present NOPR, the test procedures require that microwaves be tested in their microwave-only cooking mode as well as convection microwave cooking modes to determine the energy consumption of appliances under typical conditions of use. The test method uses water and other basic ingredients to simulate food that can be reheated using the microwave. The mixtures are then placed into a borosilicate-glass container, heated in the microwave, then tested for thermal efficiency. Packaging Many microwave-ready meals employ an exclusive packaging method known as modified atmosphere packaging (MAP). This method of packaging uses oxygen-eliminating gases to prolong the shelf-life of pre-cooked foods. These gases are typically composed of carbon dioxide or pure oxygen and nitrogen. They work by removing air that is a part of the food's surrounding. This stops spoilage and extends the shelf life of the food for the consumer. The MAP process is also employed for meat products, such as frozen steaks, chicken wings or beef patties. These packages contain a nonwoven material that absorbs moisture and helps keep the food fresh and moist for a longer period of time. This type of packaging also reduces waste by reducing the amount of air and water that is lost during the heating process. When deciding on a microwave, consumers must be aware of the model's size and power level as well as other features, like defrost settings, or sensor cooking. These features can help cook more easily however, you must be aware of how often you use them. In other words, it's not worth buying one with extra features. The style of the microwave is an additional factor to consider, as certain models come with a flush-built design that fits seamlessly into cabinetry that is already in place.