Charbroiler

Last updated
Charbroiler
ClassificationCooking equipment
IndustryVarious
ApplicationCooking
Fuel source Natural gas, Propane
Hamburgers cooking on a charbroiler Charbroiler-operations-cooking 1.JPG
Hamburgers cooking on a charbroiler

A charbroiler (also referred to as a chargrill, char-broiler or simply broiler) is a commonly used cooking device consisting of a series of grates or ribs that can be heated using a variety of means, and is used in both residential and commercial applications for an assortment of cooking operations. The heat source is almost always beneath the cooking surface and for gas-fired applications this is referred to as an under-fired broiler. Most commonly the charbroiler is a series of long evenly spaced metal ribs over a large combustion chamber filled with an array of burners that may have a deflector, briquettes or radiant between the burner and the cooking surface.

Contents

The term charbroiler is usually associated with commercial kitchen applications, though the construction and cooking process is similar to light-duty residential products referred to as grills. The terms charbroiling, broiling, grilling and char-grilling are often used interchangeably, though depending on the application and equipment involved there may be differences in how the food product is actually cooked. The Culinary Reference Guide identifies grilling as "the process used when an item is cooked on a grated surface to sear in the flavors and impart a degree of charring which gives the product a light charcoal smoke flavor." [1] [2]

Principles

Charbroiler burner - straight cast, radiant, grate & supercharger plates Charbroiler burner-radiant-grate-supercharger 3.png
Charbroiler burner – straight cast, radiant, grate & supercharger plates

Charbroilers may be either free-standing countertop equipment that sits on a stand or refrigerated base, or part of a larger piece of equipment such as a restaurant range. Nominal unit width (left-to-right) sizes are in increments of 12 in (305 mm), most commonly 24 to 72 in (610 to 1,829 mm). Typical commercial charbroilers are a system of three main characteristics: (1) burner, (2) radiant, and (3) grate. The various combinations of these individual aspects have a dramatic effect on the performance of the charbroiler, though other design features such as gas orifice sizing, under-burner heat deflectors, burner divider plates (also known as "superchargers") are also added to create unique and improved performance characteristics.

Under-fired charbroilers heat food products according to the three primary modes of heat transfer: 1) convection, 2) conduction and 3) radiation (infrared). Performance is defined by such aspects as time to heat, temperature consistency/evenness, recovery time, and productivity (pounds of food per hour for example). Most charbroilers have very pronounced 'hot' and 'cold' zones that are a function of the main system characteristics vary based on unit size and other aspects of construction. These temperature zones may vary between manufacturers, and change over time as the broiler components wear-in or fail. Certain commercial charbroiler products are designed to cook using only infrared energy, with a wide range of benefits to the charbroiled cooking process. [3]

Gas charbroilers are recognized to have among the highest energy consumption rates of commercial cooking equipment. Selecting a product to meet both menu and branding needs should be balanced against usable cooking space, productivity and energy efficiency, to the degree this is possible. [4]

Heating characteristics

Results of the plume effect in a common commercial charbroiler Charbroiler-hot spot temp profile.png
Results of the plume effect in a common commercial charbroiler

Surface temperatures are evaluated using a test methodology defined in ASTM Standard F2835-10. [5]

Charbroilers are not generally known for consistent cooking surface temperatures, which can vary by up to 400 °F (204 °C) between maximum and minimum. This large temperature differential is driven by the tendency of the burner array to create a heat plume which draws convective heat toward the center of the broiler and tends to leave the outer perimeter cooler than the interior. The elevated heat pattern from this plume effect is generally predictable and visible on the grates themselves. Temperatures well above 700 °F (371 °C) will incinerate the oils left on the grates by normal cooking processes, leaving a discernible white ash that tends to define the hottest areas.

Construction

Typical charbroiler construction involves each of the three main characteristics of a commercial charbroiler (burner, radiant and grate) and can have a range of aspects that affect the performance of the overall unit. However, the design of any charbroiler follows the same basic functional requirements: large, flat, heated ribbed surface on which to cook food with dry heat.

Charbroiler grilling is defined as "the process used when an item is cooked on a grated surface to sear in the flavors and impart a degree of charring which gives the product a light charcoal smoke flavor." Charbroiling will expose food to temperatures often in excess of 260 °C (500 °F). Grilled meat acquires a distinctive roast aroma from a chemical process called the Maillard reaction. The Maillard reaction only occurs when foods reach temperatures in excess of 155 °C (311 °F). [6] Charbroiling most food products, especially animal-based proteins such as meat, will release greases and oils that will vaporize and incinerate upon contact with the extremely hot surfaces of a charbroiler. These products of combustion will then imbue the food with a distinct flavor profile that is commonly referred to as being 'charbroiled'.

Design

Burners

Charbroiler burner - straight cast with under-burner deflector Charbroiler-burner.png
Charbroiler burner – straight cast with under-burner deflector

Charbroiler burners function to provide a largely indirect heat source for the cooking surface, whereby the majority of thermal energy is diffused by the overhead radiant element.

Radiants

The radiant component of a charbroiler is designed to diffuse, absorb and re-radiate the heat energy generated by the burner. It is almost universally tent-shaped and fabricated from cast iron or sheet metal.

Charbroiler radiant - sheet metal Charbroiler-radiant-sheet metal.JPG
Charbroiler radiant – sheet metal

Lava rock, briquettes & charcoal

Lava rock, ceramic bricks and even charcoal function as a radiant for the entire burner array. These materials also serve to diffuse the heat generated by the burners, and do so effectively, though inconsistently. [7]

Grates

Charbroiler - grates Charbroiler-grates.png
Charbroiler – grates

The grate is the cooking surface of a charbroiler (also known as the cooking grid), and often has a wide range of geometries and materials to meet operational requirements of the user. It is usually an array of ribs oriented front-to-back, commonly with reinforcing members across the middle, either at or below the cooking surface. Cast iron is the most common material used for grates, though steel rods of varying diameters are also readily available.

Grates are responsible for the distinctive sear marks (also known as branding) characteristic of charbroiled foods, and these markings are often key to the image of the restaurant using the charbroiler; markings that are thin, thick and/or cross-branded often distinguish a finished product to the consumer. Proper branding marks on animal proteins should be caramel in color (similar to a cola), but not so dark as to imply burning and charring.

Use and operation

As a general practice charbroilers are operated in the fully ON position, due to the relative inability to control surface temperature with the low range offered by the valves. As illustrated by the temperature profiles of the average charbroiler, operators also tend to manage hot spots by inclining the grates as design allows and so placing the food further away from the elevated heat zone. [8]

Charbroilers are energy intensive, and commonly use 15,000 to 30,000 BTU of gas per burner, per hour. Small units (four burners) will utilize 60,000 to 120,000 BTU/hr (approximately 0.6 – 1.2 therms of natural gas) and larger units up to 13 burners can use 195,000 to 390,000 BTU/hr (approximately 2 – 4 therms of natural gas). The average cost of a therm (100 cubic feet) of natural gas is approximately $1.00 (including taxes and fees, though costs vary by region and over time), [9] which translates into energy costs between $6 and $40 per day for a single unit operating for 10 hours.

Related Research Articles

The British thermal unit (Btu) is a measure of heat, which is a form of energy. It was originally defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It is also part of the United States customary units. The SI unit for energy is the joule (J); one Btu equals about 1,055 J.

<span class="mw-page-title-main">Wok</span> Cooking vessel originating in China

A wok is a deep round-bottomed cooking pan of Chinese origin. It is believed to be derived from the South Asian karahi. It is common in Greater China, and similar pans are found in parts of East, South and Southeast Asia, as well as being popular in other parts of the world.

<span class="mw-page-title-main">Barbecue</span> Cooking method and apparatus

Barbecue or barbeque is a term used with significant regional and national variations to describe various cooking methods that employ live fire and smoke to cook the food. The term is also generally applied to the devices associated with those methods, the broader cuisines that these methods produce, and the meals or gatherings at which this style of food is cooked and served. The cooking methods associated with barbecuing vary significantly but most involve outdoor and indoor cooking.

<span class="mw-page-title-main">Grilling</span> Form of cooking that involves dry heat

Grilling is a form of cooking that involves heat applied to the surface of food, commonly from above, below or from the side. Grilling usually involves a significant amount of direct, radiant heat, and tends to be used for cooking meat and vegetables quickly. Food to be grilled is cooked on a grill, using a cast iron/frying pan, or a grill pan.

<span class="mw-page-title-main">Smoking (cooking)</span> Exposing food to smoke to flavor or preserve it

Smoking is the process of flavoring, browning, cooking, or preserving food, particularly meat, fish and tea, by exposing it to smoke from burning or smoldering material, most often wood.

<span class="mw-page-title-main">Outdoor cooking</span>

Outdoor cooking is the preparation of food in the outdoors. A significant body of techniques and specialized equipment exists for it, traditionally associated with nomad in cultures such as the Berbers of North Africa, the Arab Bedouins, the Plains Indians, pioneers in North America, and indigenous tribes in South America. These methods have been refined in modern times for use during recreational outdoor pursuits, by campers and backpackers.

<span class="mw-page-title-main">Barbecue grill</span> Device for barbecueing or grilling

A barbecue grill or barbeque grill is a device that cooks food by applying heat from below. There are several varieties of grills, with most falling into one of three categories: gas-fueled, charcoal, or electric. There is debate over which method yields superior results.

<span class="mw-page-title-main">Convection oven</span> Appliance that heats food

A convection oven is an oven that has fans to circulate air around food to create an evenly heated environment. In an oven without a fan natural convection circulates hot air unevenly, so that it will be cooler at the bottom and hotter at the top than in the middle. Fan ovens cook food faster, and are also used in non-food, industrial applications. Small countertop convection ovens for household use are often marketed as air fryers.

<span class="mw-page-title-main">Induction cooking</span> Direct induction heating of cooking vessels

Induction cooking is a cooking process using direct electrical induction heating of cooking vessels, rather than relying on indirect radiation, convection, or thermal conduction. Induction cooking allows high power and very rapid increases in temperature to be achieved: changes in heat settings are instantaneous.

<span class="mw-page-title-main">Indirect grilling</span>

Indirect grilling is a barbecue cooking technique in which the food is placed to the side of or above the heat source instead of directly over the flame as is more common. This can be achieved by igniting only some burners on a gas barbecue or by piling coals to one side of a charcoal pit. A drip tray is placed below the food to prevent fat from the food igniting and generating a direct flame. Indirect grilling is designed to cook larger or tougher foods that would burn if cooked using a direct flame. This method of cooking generates a more moderate temperature and allows for an easier introduction of wood smoke for flavoring.

<span class="mw-page-title-main">Regional variations of barbecue</span>

Barbecue varies by the type of meat, sauce, rub, or other flavorings used, the point in barbecuing at which they are added, the role smoke plays, the equipment and fuel used, cooking temperature, and cooking time.

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<span class="mw-page-title-main">Infrared heater</span> Device designed to create radiative heat

An infrared heater or heat lamp is a heating appliance containing a high-temperature emitter that transfers energy to a cooler object through electromagnetic radiation. Depending on the temperature of the emitter, the wavelength of the peak of the infrared radiation ranges from 750 nm to 1 mm. No contact or medium between the emitter and cool object is needed for the energy transfer. Infrared heaters can be operated in vacuum or atmosphere.

The Chambers stove is a generic name for several different kitchen cooking appliances sold under the Chambers brand name from 1912 to approximately 1988. Their ranges and stand-alone ovens were known for their patented insulation methods, which enabled them to cook on retained heat with the fuel turned off.

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A kamado is a traditional Japanese wood- or charcoal-fueled cook stove.

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<span class="mw-page-title-main">Charcoal</span> Lightweight black carbon residue

Charcoal is a lightweight black carbon residue produced by strongly heating wood in minimal oxygen to remove all water and volatile constituents. In the traditional version of this pyrolysis process, called charcoal burning, often by forming a charcoal kiln, the heat is supplied by burning part of the starting material itself, with a limited supply of oxygen. The material can also be heated in a closed retort. Modern charcoal briquettes used for outdoor cooking may contain many other additives, e.g. coal.

Broiler may refer to:

References

  1. "Grill". About.com. Archived from the original on 2012-11-03. Retrieved 2012-10-09.
  2. "Grill". (etymology). Online Etymology Dictionary. Retrieved 2012-10-09.
  3. The Editors (1 October 2012). "Broilers". Food Service Equipment Reports. Archived from the original on 21 March 2013. Retrieved 9 October 2012.{{cite web}}: |author= has generic name (help)
  4. Amelia Levin (1 April 2012). "Energy-Efficient Ventilation". Food Service Equipment & Supplies. Retrieved 25 November 2012.
  5. "ASTM F2835-10". ASTM. Retrieved 2012-10-09.
  6. Monika J.A. Schröder (2003). Food Quality and Consumer Value: Delivering Food that Satisfies. Springer-Verlag. ISBN   9783540439141 . Retrieved 2012-10-09.
  7. "Differences Between Gas & Charcoal Grills". Mom.Me. Retrieved 2012-12-12.
  8. Monica Parpal. "Charbroilers: Bright Broiling Tips". Food Service Warehouse. Retrieved 2012-11-25.
  9. "Gas Supply". National Grid. Retrieved 2012-12-12.

Sources