Thursday, September 8, 2011

Evaporators


The evaporator is one of the main components of a refrigeration system, in which refrigerant evaporates for the purpose of extracting heat from the surrounding air, chilled water, or other substances.


In an air cooler, the refrigerant flows inside the metal tubes or finned tubes while air flows over them.An air cooler is an evaporator that cools the air directly in a refrigerated space or piece of equipment (such as a packaged unit). Conditioned air is then distributed through air distribution systems.A liquid cooler is different from a chiller. A liquid cooler is an evaporator, a component of a refrigeration system, whereas a chiller is a refrigeration package to produce chilled water.In liquid overfeed evaporators, liquid refrigerant is fed by a mechanical or gas pump and is then overfed to each evaporator. The inner surface in an overfeed evaporator is also wetted by liquid refrigerant.Evaporators can be classified into three categories, depending on the medium or substance to be cooled:For more information visit us at: http://hvac-world.blogspot.com/1-Dry-expansion or direct-expansion (DX):An evaporator can be used to produce ice directly, such as an ice maker in an ice harvester of an ice storage system.3-Liquid overfeed:In vapor compression refrigeration systems, the evaporator is also an indirect-contact heat exchanger.In evaporators with dry- or direct-expansion refrigerant feed, liquid refrigerant is fed through an expansion valve and a distributer, flows inside the tubes in a finned coil, the evaporator, and is completely vaporized and superheated to a certain degree before reaching the exit of the evaporator.2-Flooded refrigerant feed:In a liquid cooler, chilled water is cooled to a lower temperature and is pumped to remote air handling units, fan coils, or other terminals for air conditioning or other applications.In evaporators with flooded refrigerant feeds, liquid refrigerant is fed through a throttling device and vaporizes outside the tubes within a shell. The refrigerant-side surface area is always wetted by the liquid refrigerant, which results in a higher surface heat-transfer coefficient.

For more information visit us at: http://hvac-world.blogspot.com/




Gov 2.0 topic for policy makers, technology users this week in OKC


Call it citizen journalism meets social good.


Or self-described technology geeks just wanting to help others."The common thread is that we all have an interest in Oklahoma, and we're all a bit geeky. We've adapted to social media well," Butler said. "It won't be the exclusive spot for people to go, but we want to provide something that is helpful for the public. There is so much information in a crisis, and so many disparate strands that come in, and we want to provide as much as possible for the public to utilize.""Because we're a loose network of interested people right now, it's hard to plug into a command and control structure for emergency management," he said. "If we had a more formal organization, they would feel better about that."A loosely formed and continually evolving group, the Oklahoma Crisis Mappers, is finding new ways to keep their fellow Oklahomans better informed during the state's sundry crises: blizzards, ice storms, wildfires and even the occasional earthquake. Their work got under way during the 2009 Christmas Eve blizzard, when technology and a Google map allowed stranded drivers to make their way to food and warm beds. Since then, the concept and collaboration has grown."There were no rules and no parameters - it quickly became an ad hoc way for people to communicate, and the map acted as a static collection point," Burgess said."We are end-users of data from the government," said John Butler, a Lawton pastor and college instructor who helped start Oklahoma Crisis Mappers. "What people in the movement have been pushing for is to have more data available to the public. Oklahoma is a lot farther down the road in that regard than many places across the country, and we're grateful for that.Since then, Butler has created several other maps to have at the ready - an Oklahoma Ice Map (which has seen good use the last two winters), an Oklahoma Fire Map, an Oklahoma Tornado Map and an Oklahoma Quake Map, should a major earthquake ever occur. His goal is to have an extensive foundation in place for each map so that volunteers can respond to the specific crisis when it occurs. About a dozen people across the state gather information; many have never met face to face, Butler said.Butler and local Gov 2.0 advocate Sid Burgess have collected more volunteers to operate Oklahoma Crisis Mappers since its launch. The concept began with a Google map that could be edited by anyone. During the holiday snowstorm, people stranded on the roads would access the site from their smartphones and post their location and needs. Before long, someone else would reply with an offer of a place to stay or advice about roads to avoid. Burgess and Butler fleshed out the map with weather information from emergency management officials, Twitter posts about shelters, media reports and more.But information first has to be accessible for the group to do its work, Butler said. Gathering some of the information has been easy; in other cases, they've been stymied by officials who balk at giving out information the group believes should be available, he said."But it's also important to overcome the mentality of, 'We're the government; we're the ones in charge of data and we will parcel things out to you,' as opposed to a more participatory type of government," he said.The idea behind Oklahoma Crisis Mapping will be a top topic at the Gov 2.0a conference Friday and Saturday at the Skirvin Hilton Hotel in Oklahoma City. Open data, crowd sourcing and citizen participation are overarching themes. Burgess, an organizer of the conference, said Oklahoma has already taken big steps in those areas, such as the state's data.ok.gov website and Oklahoma City's pilot use of SeeClickFix, which allows people to snap a photo of a problem they encounter, such as potholes or graffiti, and send it directly to the city's action center.For information about the conference, visit gov20a.com.Their efforts are part of the larger Gov 2.0 conversation taking place in Oklahoma City this week, when technology users and policymakers come together to talk about making government and information more transparent, participatory and collaborative.Butler said he'd eventually like for Oklahoma Crisis Mappers to incorporate as a 501c3 nonprofit organization. That would allow the group to apply for funding to pay for training in graphic information system platforms, he said, and perhaps make the group more accepted in the eyes of emergency management officials.

For information about the conference, visit gov20a.com.




Wednesday, September 7, 2011

Sweets & Tweets! Ben & Jerry’s Utilizes Unused Twitter Characters to Carry Fair Trade Message


FairTweets.com Social Media Campaign Communicates Fair Trade Value to the Masses


So make every Tweet count – just like Fair Trade products purchases - by sharing this message with your Twitter followers. Through the effort, Ben & Jerry’s will increase consumer understanding of the value of their own purchase decisions and help farmers across the globe lick some of their daily struggles.On May 3rd, Ben & Jerry's launched a "Fair Tweets" campaign to rally awareness of Fair Trade. Simply by logging on to Fair Tweets (fairtweets.com), Twitter users have been able to plug in automatic messages about Fair Trade to the tweets they're already sending. These added messages promote the upcoming World Fair Trade Day (May 14) and Fair Trade issues in general.BURLINGTON, Vt. -- How can an ice cream maker use social media to help provide farmers a fair income across the globe? Ben & Jerry’s, the first ice cream company to use Fair Trade certified ingredients, is taking on the challenge in an innovative manner. The Fair Tweets program is a simple and easy interface for Twitter followers to donate their unused social media space to support Fair Trade messaging.It’s no surprise as Ben & Jerry’s was the first composite, major consumer goods product to commit to going through every single item in their ingredient deck to change all they could to Fair Trade. So the natural next step was how to share the values of Fair Trade with a larger audience. The progressive ice cream company has created a program that allows any user of Twitter to easily plug into. Unused characters in each Tweet are utilized to share a message about how Fair Trade benefits farmers across the globe. Cofounder Jerry Greenfield has posed: “Who wants to make a profit by exploiting somebody else?” It is in that spirit that the company is acting to lead the way in showing how the purchase of Fair Trade certified goods makes a difference. The model sets a fair wage for farmers, supports farms with access to credit, encourages community development, and promotes a holistic way of farming for farm laborers, the environment and the land necessary to their trade.“Just like putting together good combinations for our flavors, our goal was to combine a popular social media tool with our effort to educate about Fair Trade,” said Senior Global Marketing Manager, Noelle Pirnie. “We’ve heard how easy it has been for our fans to participate and that they better understand how their purchases help make it possible to support these farmers throughout the world,” Pirnie added.To participate in Fair Tweets, log on to FairTweets.com. To learn more about Ben & Jerry’s support of Fair Trade, go to www.benjerry.com.Even though Tweets can be up to 140 characters long, most tweets are actually much shorter, using only 40 characters on average. Fair Tweets recycles the "unused" characters in those tweets, and puts them to good use, committing them to Fair Trade awareness.About Ben & Jerry’sHOW IT WORKS* The FDA has said no significant difference has been shown and no test can now distinguish between milk from rBGH treated cows and untreated cows. Not all the suppliers of our other ingredients can promise that the milk they use comes from untreated cows.

* The FDA has said no significant difference has been shown and no test can now distinguish between milk from rBGH treated cows and untreated cows. Not all the suppliers of our other ingredients can promise that the milk they use comes from untreated cows.




3 new spots for a cool-off


SAN FRANCISCO


Skylite Snowballs It was a blistering day when Katie Baum had a fierce craving for a snowball, the sno-cone-meets-shave-ice of her native Baltimore. So she bought a '75 ice cream truck, had it rebuilt, and hired a Chez Panisse pastry chef. Track her down on Piedmont Avenue, near the Clare-mont Hotel, or at Oakland's First Fridays to try one doused with strawberry or Meyer lemon-ginger syrup. To go totally Baltimore, top your snowball with Katie's homemade marshmallow cream, skylitesnowballs.comEAST BAYSANTA CRUZSmitten Ice cream freaks have been following Robyn Goldman and her Radio Flyer wagon around the city since she first wheeled it out nearly two years ago. It toted her hand-welded invention, Kelvin--a liquid nitrogen-powered ice cream maker that whirs and pours fog like something out of Willy Wonka's inventing room, super-freezing five or so ingredients into a single scoop of absurdly dense and creamy salted caramel or blueberry candied coconut ice cream. Now, Smitten has opened up a real shop--well, sort of. It's in a converted shipping container in Hayes Valley at Octavia and Linden Streets. smittenicecream.com

The Penny Ice Creamery Santa Cruz has never suffered a lack of icecream. But what it hasn't had, until now, is a place that makes its own on-site. No secret ingredients here; you can watch them mix up the small organic batches. Pull up a stool in the vintage-chic parlor to dig into a scoop of strawberry pink peppercorn, or cherry balsamic. Nice day? Grab a Penny Pop, dipped in dark chocolate, and take it for a ramble around downtown. 913 Cedar St.; 831/204-2523.




Tuesday, September 6, 2011

Unilever North America


The adult frozen novelty line--Magnum--is making its way to the U.S. marketplace after celebrating success elsewhere in the world for the past 20-plus years. Magnum was one of the first handheld ice creams targeted as a premium adult offering and today is one of the world's leading ice cream brands, selling one billion units annually worldwide.


The bars come in six varieties, all of which include a thick coating of Belgian chocolate. The bars are wrapped in the brand's signature golden foil packaging, and retail in 3-count multipacks with a suggested retail price of $3.99 or individually for a suggested retail price of $2.59.

The bars come in six varieties, all of which include a thick coating of Belgian chocolate. The bars are wrapped in the brand's signature golden foil packaging, and retail in 3-count multipacks with a suggested retail price of $3.99 or individually for a suggested retail price of $2.59.




Show and sell: packaging protects the product, but it is also a billboard of sorts where processors make claims about a food's nutrition, value and ingredients


Dairy processors expect an awful lot from the packaging surrounding the foods they manufacture. Primary packaging must protect the product; show product benefits, ingredient statements and nutritional information; fit on retailers' shelves and inside consumers' refrigerators; be attractive and eye-catching; and be recyclable. That's a tall order, but one that processors do not shy away from. They can't, actually.


Anthony Caliendo is trying to build a consumer brand of cheese, and he's counting on the packaging to help."If you are not innovating in packaging you aren't in the game," he says.Health campaigns, such as the 2010 Dietary Guidelines for Americans, have cheesemakers making claims about reduced sodium levels on the package. Consumers' interest in what's in the foods they eat has ice cream makers touting their clean labels. Brand competition has dairy processors updating their packages to stand out in the dairy case. Sustainability initiatives have all food manufacturers looking for recyclable package materials."We wanted to stand out," says Brandie Genibrel, sales and marketing director.Rather than storing individual packages of string cheese in a refrigerator's cheese drawer, the box makes the cheese more visible as family members look for snacks, Price says. She adds that retailers are sellin more SKUs because of the package. A regional roll-out began in the fourth quarter of 2010 in the Southeast and moved to the Northeast and Midwest in January."The containers are made from impact-resistant polypropylene," says Mike Corrigan, who works for the packaging supplier based in Omaha, Neb. "The container and lid are in-mold labeled. Also noteworthy is the built-in tamper-deterring feature," he says.The old packaging was very brown and plain and looked like everyone else's, she says. The dairy processor has been making gelato since 1976. It makes six flavors of gelato and three flavors of sorbets. It is also a co-packer of ice cream for another brand.Gelato Classico changed to a cube-shaped pint package (actual dimensions 3 1/2 inches tall by 3% inches wide and 3% deep). The processor needed to buy a new filler for the shape.Philadelphia has as many as 50 SKUs. The redesigned package helps consumers find the product easily on a retailer's shelf and in their own refrigerators. A strawberry image, for example, is a visual identifier of the flavor. Inevitably, the fronts of packages are rotated away once the product is on a retailer's shelf. By printing a strawberry image on both sides of the package, Kraft helps a shopper find the flavor he/she wants. (See photos on page 40.)On the retail shelf, the containers stack three high. The cube shape fills the space and fits better, Genibrel says. A lip on the lid allows for better stacking.Caliendo is the vice president of sales for JVM Sales, Linden, N.J., which is developing Milano into a consumer brand. JVM has been making cheese for private-label customers and for institutional customers. The company developed a 1-pound bag of Parmesan to respond to consumers seeking value. The pillow-type packaging offers more cheese for the money, he says. The company's next step is to roll out a recloseable package with a zipper seal. That product will retail at a higher price point. JVM bought high-speed fillers for its bags and cups.In response to comments from customers, the cheesemaker recently developed a stand-up box for its four flavors of string cheeses. The 18-count box contains and organizes the individual servings inside a consumer's refrigerator. The box stands upright and is an alternative to 12-count flexible film pouches.The decision to redesign can be triggered by competitive activity, brand performance, internal goals and consumer behaviors, says Len Martinez, director of design and innovation for the cheese division at Kraft Foods, Northfield, Ill. Business was fine with the Philadelphia brand, but Kraft redesigned the package in part to address how the container was functioning on the shelf, Martinez says. Consumers were having trouble finding the flavors they wanted, he says, and Kraft wanted to increase the shelf impact.In the high-end ice cream category, two processors recently updated their packages for slightly different reasons. Santa Barbara, Calif.-based McConnell's expanded beyond its home base to Southern California and needed a package design that quickly communicated its benefits. Gelato Classico, Concord, Calif., changed the color and shape of its gelato pints to stand out on grocers' shelves.After the new packages were printed, Burns thought of what he'd do differently. After a shopper told him she couldn't see the names of the flavors when the product is on a high shelf, he realized he should have printed the flavor names on the banding around the lids. The company makes 37 flavors of 17% butterfat ice cream.As silver is a signature color for the Philadelphia brand, burgundy is the signature of Sargento, Plymouth, Wis. The color conveys quality, a premium feel and other "positive emotions," says Erin Price, director of marketing.After designing and printing the new packages, McConnell's received kosher certification. That logo will be added later. The package includes the Real California seal from the California Milk Marketing Board, South San Francisco, Calif, and that has paid dividends, Burns says. The seal shows that McConnell's is a local company, Burns says. Santa Barbara accounts for 33% of sales and Southern California for 60%. (The remainder is mostly in Northern California and Arizona.) The CMMB funnels leads to McConnell's. "If a retailer says 'We want a California ice cream company,' they refer them to us," Burns says. "I wasn't expecting that."By working with its vendors, WhiteWave says its research and development team developed a more "earth-friendly packaging solution" without affecting the product's shelf-life. (Read more about the company's sustainability efforts in this month's "Inside Perspective" on page 86.)WhiteWave Foods, Broomfield, Colo., removed polyvinylidene chloride, or PVdC, from the packaging for its single-portion creamer products found in restaurants and grocery stores.Processors of fluid milk and cultured products also are turning to sustainable materials for their packaging.Kraft changed its printing method from dry offset printing to the more expensive in-mold labeling printing process. The new process yields better rendition of photos and colors and allows for softer vignettes, more subtleties in the graphics and a more refined silver color (Philadelphia's signature). With the in-mold labeling process, a label is applied to the cup and becomes embedded into the plastic, Martinez says.McConnell's general manager Scott Burns says a marketing study revealed that its customers did not know that the company does not use additives in the ice cream, only pure ingredients. A redesign of the graphics removed the image of the Mission Santa Barbara and replaced it with one of ice cream on a spoon. The imagery is intended to entice customers to pick up a pint, Burns said. Some local Santa Barbarans missed the picture of the mission, which had been on the packaging for 40 years. But that was the only negative feedback, Burns says.Sargento is also using packaging to support the launch of its Blends product that combines two natural cheeses. On-pack words and graphics convey the idea, and a package window shows the cheese (sold in slices and snacks) and the blend of colors. Sargento reduced sodium levels by 25%, a benefit displayed prominently on the package.The processor also redesigned because it wanted a recyclable package, something the previous version was not.

By working with its vendors, WhiteWave says its research and development team developed a more "earth-friendly packaging solution" without affecting the product's shelf-life. (Read more about the company's sustainability efforts in this month's "Inside Perspective" on page 86.)




Monday, September 5, 2011

A Guide To Refrigeration Equipment


No restaurant today can get away without purchasing or leasing some sort of refrigeration equipment. But what kinds of refrigeration do you really need?


*Freezers have approximately the same considerations as refrigerators, but ease of access is generally not quite as important. With freezers, it's even more important than with refrigerators that you are certain you want a walk-in before you get one; there are few standalone walk-ins on the market.* Refrigerators are the first and simplest. While stainless steel is the standard for an ordinary reach-in refrigerator, you can get away with anything that can be kept clean over the course of a normal business day. Be aware of what you need to store, and purchase a refrigerator with shelves that are strong enough to hold the weight of your products and that are easy to get to. Storing items in the door is a bad idea, as this part of the fridge stays warmer than the rest in a frequently-opened appliance, so don't count on that for a lot of your storage.* If you go for a walk-in, consider whether this will be a permanent install or something you can take with you if you have to change locations. If you have a lease you may not be keeping long on your current space, it might be better to just be tough and purchase multiple movable refrigerators rather than go for a permanent install. Also, make sure your walk-in has an easy means for opening it from inside. This is generally only an issue with older units.* In the simplest small restaurant setup, like snack stands, a standard home kitchen refrigerator dedicated to restaurant business is adequate providing you use thermometers to measure temperatures instead of counting on the equipment to work properly. All others need something a little more complex.Also, if you use an icemaker to fill ice dispensers or transport ice in buckets to other locations, you have to be very aware that it must be kept sterile. Food poisoning is often caused by unsanitary ice bin conditions when employees assume that the cold will kill any bacteria.Before purchasing any refrigeration equipment, know your restaurant, your needs, your space, and your customers. Making the right choices will save you more money in the long run.* A different type of refrigerated unit is an icemaker. This is totally different; before purchasing one, you should be clear about whether you want cube, nugget, or flaked ice for your business. You should also be aware of the space needed; an air-cooled icemaker requires a lot of space to function efficiently, while a water-cooled icemaker needs much less space, but also wastes a lot of water.* If you have a medium to large restaurant, you'll probably have to consider a walk-in refrigerator. These are all industrial, so you won't have to worry so much about temperature control. Pay close attention when the salesperson tells you how much storage space you need; even though you may think you can get away with less, you're better off counting on needing more than you expect. This also allows for expansion if you branch into other things, like catering.

Before purchasing any refrigeration equipment, know your restaurant, your needs, your space, and your customers. Making the right choices will save you more money in the long run.