Monthly Archives: April 2011

Energy costs of cooking sous vide

We frequently get asked: What is the cost of electricity to run the Sous Vide Professional? So we performed some research and testing to find out for ourselves!

We used average costs of utilities in the USA as of September 2010 – electricity at $0.132 per kilowatt/hour and natural gas at $1.062 per therm.

There are two stages to the heat up/cook process when using the Sous Vide® Professional – initial heat up and holding (cooking). During the initial heat up, more power is consumed as the unit heats at full power to reach the desired temperature. The duration of this step can be greatly shortened by starting with hot water.

For our experiment, we started with cold tap water at 9°C (48.2°F). Cost of initial heat up: $0.15. Had we started with hot water, the cost and duration would be reduced by more than half.

We then vacuum sealed a 2lb beef tenderloin and allowed it to cook for two hours at 59°C (138.2°F). Cost of 2 hours of cooking at 59°C: $0.06. This makes our total electricity cost $0.21.

For more information about the cost benefits of sous vide, check out this post on our blog for a number of ways cooking sous vide can actually reduce costs of labor and raw materials. You might also find this case study by Chef Chris Windus interesting, where he discusses how sous vide has helped him to increase efficiency without compromising quality.


The opening of Aviary


Nathan Myhrvold’s Modernist Cuisine Dinner

A wonderful Dinner at Nathan’s laboratory kitchen on April 15, 2011.
To see more pictures of the food click here

Nathan Myhrvold

Nathan Myhrvold

 

 

for more photos click this picture


The Anti-Griddle Story

Recently Chef Grant Achatz appeared in an interview with Terry Gross on NPR’s  Fresh Air. We thought we’d share this excerpt of the script where he is talking about the development of the Anti-Griddle.

Chef Grant Achatz with The Anti-Griddle

Chef Grant Achatz with The Anti-Griddle

GROSS: This is FRESH AIR. I’m Terry Gross, back with chef Grant Achatz. His new memoir, “Life, on the Line,” is about his avant-garde style of cooking and about getting diagnosed with stage IV tongue cancer. The treatments eradicated his sense of taste, and he was uncertain it would ever return. It did. He’s been in remission since late 2007. Achatz co-founded the Chicago restaurant Alinea, which was named best restaurant in America by Gourmet magazine in 2006. In 2008, he was named best chef in the U.S. by the James Beard foundation. In a few weeks, he’ll open a new restaurant called Next. When we left off, we were talking about his food innovations.

You’ve had to create new technology in order to create some of the foods that you’ve created. Tell us one of the unusual pieces of technology that you either borrowed from another field and now use in food, or that you basically created.

Mr. ACHATZ: We realized early on with the opening of Alinea that we were going to have to look to other disciplines and other avenues for technology and tools that would help us cook, shape, manipulate the ingredients in the way that we wanted. One of the items that we came up with is called the anti-griddle. And we partnered with, collaborated with a company in Niles, Illinois call PolyScience, and PolyScience is owned by gentlemen by the name of Philip Preston. And Philip is a big foodie, and his company basically supplies the medical industry with a lot of temperature-control technology. So he does specific water bass that can be either super-hot or super-cold, down to like 100th of a degree. So he was very versed in laboratory-style equipment.

We came to him and said, you know, maybe there’s some way that we can collaborate on a piece that basically is the inverse of the pancake griddle that I grew up cooking on at my parent’s diner. So you have a large, stainless steel surface, and instead of it being hot, we want it to be incredibly cold. And he got kind of excited about the challenge, and three days later, he had what he called the Frankenstein version of it…

(Soundbite of laughter)

Mr. ACHATZ: …which was the prototype. It wasn’t real pretty, but it worked. And so that stainless steel plate gets negative 50 degrees Celsius. And it allows us to freeze – not only freeze things that normally don’t freeze. So, for instance, if you take a cup full of olive oil and put it in your freezer at home overnight, you’re going to wake up the next morning, and it’s still going to be liquid because the freezing point of olive oil is very, very low. So you take a tablespoon of that olive oil and you put it on top of the anti-griddle, and it will instantly freeze.

GROSS: What’s an example of something that doesn’t usually freeze that you’ve frozen and served?

Mr. ACHATZ: Well, I think olive oil is a good one – is a good example. So we, you know, we’ve actually made olive oil lollipops, essentially.

(Soundbite of laughter)

Mr. ACHATZ: So you can take olive oil, freeze it on the anti-griddle with a stick in it. And then once it comes off the anti-griddle, we seasoned it with very – depending on whether we wanted it sweet or savory. So in this case, we did a savory olive oil lollipop, where we seasoned the outside with salt, smoked paprika and some dried basil. And so basically, you’re now kind of in the South of Spain with those flavors. And it looked like a lollipop, came on a stick, and it was savory and fatty. And as soon as you put it on your palate, of course, the olive oil immediately starts to melt and kind of floods the palate with this smoky paprika, savory, almost like a roasted red pepper oil. It was really interesting.

GROSS: Part of what we base our sense of taste on is what we see on the plate.

Mr. ACHATZ: Absolutely.

GROSS: And that affects our expectations. So if the shape of the food or the texture of the food doesn’t conform to our expectation of what that food is, is that going to taste different because of that?

Mr. ACHATZ: I don’t know that it will taste different, but you’ve touched on something that is what we really focus on, you know, and this is – this goes back to part of crafting that emotional experience. So if I present to you something that I call a root beer float, and again, it’s not in a glass. It’s on a plate. It’s not liquid, it’s solid, and it’s not brown. It’s completely clear, and I say root beer float, and you look at it and you look at me and you think I’m crazy, I think that’s a good thing.

(Soundbite of laughter)

Mr. ACHATZ: Because now you’re already – you’re engaged, and that’s kind of what I was talking about before. We’re engaging you on so many different levels. And then the payoff is that when you put that perfectly clear, bite-size cube in your mouth, it tastes like a root beer float. And then everybody wins.


Sous Vide Professional vs. 7306C: A Comparison

The Sous Vide Professional™ is the next generation of Sous Vide cooking system from PolyScience. Like all of our products, the Sous Vide Professional™ is designed and manufactured in our Niles, Illinois headquarters.

During the design process, we had three specific goals:

  • Create a unit that reflected the input we’ve received over past years from the world’s best chefs.
  • Maintain the same high level performance and quality that you’ve come to expect from PolyScience.
  • Streamline the manufacturing process to be able to deliver this new unit at a lower cost.

With the Sous Vide Professional™, we have achieved these goals. We understand though that some of our customers may not be ready to move onto our newest product and that’s why we’re still offering both models, for now.

Size

The Sous Vide Professional™ is slimmer and takes up less space in the water bath. It allows for better handling and is easy to store in a drawer when not in use. Many chefs mentioned that they are excited about it because it fits better in their travel bag. 

Protective Design

The Sous Vide Professional™ design incorporates the protection of the pump and heating systems, eliminating the need and cost for an additional protective cage. The outer casing is made of a durable, FDA approved, laboratory grade polymer. The back cover can be easily removed for cleaning of the heating coils. The side vents of the 7306C were repositioned to the rear of the Sous Vide Professional™. This helps minimize the amount of steam and atmospheric grease that can collect in the unit. This will lead to longer life of the pump and control electronics.

Stability and Heating Time

The Sous Vide Professional™ is equipped with a more aggressive PID control (proportional–integral–derivative) that allows for quicker heat up and response time. The trade-off to the stability of the 7306C is 1/100th of a degree Fahrenheit. The stability of the Sous Vide Professional™ is 0.1°F and 0.09°F for the 7306C. Reaching set temperature faster outweighs the benefit of 0.01°F more stability.

Temperature Display

The new large display on the Sous Vide Professional™ shows SET and ACTUAL temperature at the same time. During design, all collaborating chefs preferred this new feature. We also listened to chefs that mentioned that they often switch between temperature units (Fahrenheit and Celsius). The 7306C requires a restart of the unit while the Sous Vide Professional™ allows this quick change during operation.

Pump Flow

Both units have adjustable flow rate, it’s just achieved in a different way: The Sous Vide Professional™ features a sliding adjuster to change pump flow at the pump outlet, while the 7306C has a two-speed switch. Both methods allow you to have maximum pump output or reduce flow for delicate food items such as eggs.

Which 7306C feature is not available on the Sous Vide Professional™? 

Temperature Preset Buttons

We found out that an overwhelming majority of users are not using the preset temperature buttons found on the 7306C. When asked, chefs were not willing to pay more to have this feature. So we decided to eliminate this feature with the new model and give you the benefit of a more affordable system.

 

PERFORMANCE

Maximum Temperature: 100°C

Temperature Stability: ±0.1°F (0.06°C)

Pump: 1-speed with adjustable slider

Pressure Flow Rate (max): 12 Liter per Minute

Heater Output: 1100 Watts / 3753 BTU

 

OPERATION

Display Type and Size: EasyView™ LCD 2.12 x 3”

Menu Language & Prompts: English

Minimum Immersion Depth: 3.375 in / 8.57 cm

 

SAFETY

Over Temperature Protection: yes

Failsafe Heater Control: yes

Low Liquid Level Safety: yes

Alarm and Fault Indicators: Icon indication

WEIGHT & DIMENSIONS

Unit Dimensions:

14.125 x 3.875 x 7.375 in / 35.88 x 9.84 x 18.73 cm Unit Weight: 9.5 lbs / 4.1 kg

Shipping Dimensions:

18 x 11.5 x 9 in / 45.72 x 29.21 x 22.86

Shipping Weight: 12.75 lbs / 5.78 kg


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