When it comes to chillers, figuring out where to start is the tricky part. Air-cooled or water-cooled? Used or new? What size do you need? The experts at Cold Shot Chillers cover all of these questions and more in today&#;s article.
An industrial chiller is a refrigeration system that keeps equipment and materials cool, allowing operations to run smoothly. Air Conditioners dehumidify air while water chiller systems cool down fluids that can be used to condition spaces or cool processes, simply by removing heat. However, these units are not &#;cooling&#; or &#;chilling&#; anything; they simply remove heat.
There are a few general rules of thumb to keep in mind when selecting a new cooling system. Keep reading to gain a better understanding of the different chiller types available on the market.
Size is one of the biggest factors to consider when buying a chiller. Selecting a correctly sized chiller is paramount. A chiller that is too small won&#;t properly cool your equipment or materials. On the other hand, a chiller that is too large will work just fine, but providing excess capacity will over time fail prematurely due to short cycling. In addition, you&#;ve spent more money than you needed to. So how do you know what size chiller you need?
Industrial chillers come in a variety of sizes, ranging from ¼ ton to thousands of tons in capacity. We recommend you use a chiller size calculator to determine what size chiller you need for your application. Below are some examples of chiller sizes based on industry standards.
Keep in mind that these sizes are only based on industry standards. Manufacturers like Cold Shot Chillers can design and build custom units of virtually any size. We highly recommend using a chiller sizing tool with exact measurements for the most accurate estimation. You can also reach out to our experienced team for additional help with sizing requirements or general questions.
Chillers have various applications for all types of industries. For example, they are used for medical applications such as radiotherapy, PET scans, laboratory operations, and even blood bank refrigeration. In addition, MRI chillers and CT chillers are used frequently in the healthcare sector.
Food processing chillers serve a variety of applications in the food and beverage industry. Depending on your specific setting, you can choose from bakery chillers, winery glycol chillers, brewery glycol chillers, dairy milk chillers, and even commercial yogurt machine chillers.
Metal finishing chillers can be beneficial for paint and powder coating, anodizing, die casting cooling, furnace cooling, quench cooling, and more.
Explosion-proof chillers are commonly used in chemical processing plants, coal plants, oil and gas refineries, and other work environments that interact with flammable gases and vapors.
Cold Shot Chillers offers additional industry-specific chiller types, including laser chillers, plastic processing chillers, government and municipal chillers, welding chillers, and more.
Industrial chillers can be categorized in a few different ways. Let&#;s take a look at five types of chiller classifications.
Industrial chillers can range in price anywhere from hundreds to thousands of dollars. As mentioned before, water chillers are typically more expensive than air-cooled chillers. In addition, different chiller manufacturers all design and price their systems uniquely, so make sure to carefully compare prices and weigh your options before making a purchase.
Always familiarize yourself with the manufacturer and their policies ahead of time. Ask the following questions and more before choosing a chiller:
Looking to buy a new or used chiller? Look no further! Cold Shot Chillers is a Houston-based industrial chiller manufacturer with decades of industry experience.
We hope that you&#;ve learned some valuable information here that will help you make the best purchase. We&#;re confident that we can find a solution for you, no matter what you&#;re looking for!
Walk-ins come with several different types of skins, depending on what the customer desires. Each of these skins provides different benefits.
1. Galvalume &#;Galvalume is steel coated with a combination of aluminum and galvanizing material. It has the strength of steel but is twelve times more resistant to corrosion than galvanized. It is usually provided in a 26-gauge minimum thickness and is a gray color that is usually embossed to make it look more appealing. It is generally less expensive than aluminum, stainless steel, and G90 galvanized. If you&#;re looking for value, it is the product of choice.
2. G 90 Galvanized Steel &#; This metal used to be the most popular choice for walk-ins, but with its exorbitant increase in price, it has lost popularity. The G90 depicts the type of galvanizing it has, with G60 having less resistance to corrosion than G90. G90 is the minimum needed in producing a walk-in cooler or freezer. It used to have the advantage of being reasonably priced but has since become sensitive to price fluctuations. The material is strong and more dent resistant than aluminum. Another disadvantage to this metal is that it can develop &#;white rust&#; if it is not handled correctly in installation and/or if caustic cleaners are used. Once white rust has formed, it can turn into red rust if not treated. G90 can be stucco embossed, making it even stronger while also giving it an embossed look that is sometimes desired in the market. G90 is usually provided in 26-gauge minimum thickness for walls and ceilings and a 16&#;20-gauge thickness for floors. Note that G90 Galvanized floors are not approved for manufacture by the National Sanitation Foundation for food service applications. They can, however, be used if quarry tile is installed over the floor before use.
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3. Aluminum &#; Aluminum as a raw material is more sensitive to price fluctuations. It is very resistant to corrosion, except when in contact with salt spray. It is not as strong as other metals and can dent very easily. Aluminum is usually provided in 40-60 mill thickness for walls and ceilings and 100-120 mill thickness for floors. Aluminum floors can be made 1/8th-inch thick and diamond tread-plate embossed to add further strength. When aluminum is used for walls and ceilings, it can be stucco embossed to increase its strength.
4. Painted G90 Galvanized &#; Painted galvanized is more expensive than Galvalume but is more resistant to corrosion and has the benefit of providing a choice in color for customers who want the painted look. The paint system used on the walk-in must be approved by the NSF.
5. Stainless Steel &#; Stainless steel is the most expensive of all metal skins that are normally used in walk-in construction. It is the strongest and least corrosive of all the metals and usually comes in 24 or 22-gauge thickness. It comes in different finishes, such as brushed and polished. Most walk-in coolers come with a brushed look to reduce the visibility of scratches.
Deciding on which skin you desire depends on what features are important to you.
Refrigeration systems consist of a condensing unit and a unit cooler. The condensing unit is located outside the walk-in, and the unit cooler is located inside the walk-in. The compressor works to compress gas into a liquid. That liquid is then pumped through the condensing unit coil while a fan blows outside air through the coil. Gas is condensed to a liquid and is then pumped through a pipe into the walk-in to the unit cooler. There, through the expansion valve located in the unit cooler, the liquid can expand back into a gas. The expansion of the liquid to a gas causes a rapid chilling of the evaporator coil. Inside the walk-in, since heat always flows towards cold, air is blown across the evaporator coil to let the coil absorb the heat. The gas is then allowed to exit the walk-in through a larger pipe to the condensing unit, where it is once again compressed and cooled to a liquid state and returned to the unit cooler inside the walk-in. Then, the cycle restarts.
The new EISA law requires all new walk-ins to be equipped with high-efficiency motors to be compliant. These cost more but save you money in the long run. Some suppliers may try to sell you non-EISA compliant refrigeration systems. To be compliant with the law and purchase the best lifetime value always ask for EISA-compliant equipment.
1. Remote Systems &#; Remote systems are the least expensive systems to purchase. They consist of a condensing unit, unit cooler, and miscellaneous parts such as an expansion valve, sight glass, a dryer, pump down solenoid, and thermostat, all for installation into the system. For freezers, a timer and drain line heater are also included. These systems provide an advantage by allowing the condensing unit to be located outside the building. This means that the condensing unit can dump its heat there without adding extra heat to the building and air conditioning systems. Remote systems do require the use of a licensed refrigeration installer, as the systems are pumped down and charged with refrigerant gas on site. The installer will also charge for any other parts needed for the installation, such as copper pipe, pipe insulation, connectors, and electrical. Remote systems are less expensive systems to buy with the walk-in, but they may cost more overall depending on the hourly rate of the installer and the cost of the parts they provide.
2. Pre-assembled Remote Systems &#; Pre-assembled Remote Systems, are the same as Remote Systems except all the parts are shipped and installed on either the condensing unit or the unit cooler. Pre-assembled Remote pre-charged systems come with the condensing unit, the unit cooler, and the line set (copper pipes that connect the two units) charged with refrigeration gas. A licensed refrigeration technician will be needed to install the refrigeration system. These systems may or may not be less expensive depending on the cost of the system, the refrigeration service, and electronics service charges.
3. Saddle Mount Refrigeration Systems &#; Saddle Mount Refrigeration Systems come completely pre-assembled on a bracket that is designed to be mounted over the top of one of the wall panels. These systems must be installed on a panel with slots cut in the top to allow the bracket to go through the wall and must be hung before the installation of the roof. These units also have the unit cooler hanging from the top of the panel so that it doesn&#;t interfere with any shelving. A licensed refrigeration technician will not be needed to install the refrigeration system.
4. Penthouse Refrigeration System &#; Penthouse Refrigeration Systems do not have a unit cooler sticking down inside the walk-in. The air inside the walk-in is drawn up through the evaporator coil located with the condensing unit to be cooled. The condensing unit is located on the top of the box, meaning proper height will be needed above the walk-in to be installed and operate correctly. The unit needs proper airflow to prevent overheating. These systems sometimes seem higher in upfront cost, but when all things are considered, including the fact that they are factory assembled and do not take up space inside the walk-in, it is less expensive in the long run. A licensed refrigeration technician will be needed to install the refrigeration system.
Whatever the refrigeration system you chose, it is important to check the efficiency of the unit and the manufacturer&#;s warranty before you make your final choice.
The key to determining the proper refrigeration load requirement for any box rests on two general items:
Ambient temperature or ambient temperature difference from external box temperature to internal box temperature can have a significant impact on the load required.
On walk-in coolers, for example, the difference in wall and infiltration loads from an 80°F ambient to a 90°F ambient is approximately 18-20%. From an 80°F ambient to a 100°F ambient, that difference increases as much as 30%. See table 1.
Data from Russell&#;s Engineering Manual
Data from Russell&#;s Engineering Manual
In all cases, the refrigeration technician should use proper sizing tools such as the Russell Engineering manual RU-ENG-A to determine the proper load requirements.
Source: HTPG Tech Note February
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