Frequently Asked Questions
A quick reference to common questions about our Thermal Energy Storage system. If you still have questions that we have not addressed, please reach out to us.
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1. WHAT IS THERMAL ENERGY STORAGE (TES)?
TES is the storing of excess thermal energy (energy in a system due to its temperature) for future use.
2. HOW DOES YOUR THERMAL ENERGY STORAGE SYSTEM WORK?
The Viking Cold TES system leverages existing refrigeration equipment in low-temperature facilities to freeze Phase Change Material (PCM) when energy costs are lower and system efficiencies can be exploited. This allows intelligent controls to turn off refrigeration equipment during periods of high energy costs while the PCM maintains temperature stability and low energy consumption. The result is 20% to 35% lower energy costs, 38% greater temperature stability and more efficient, longer lasting refrigeration systems.
3. WHAT IS INCLUDED IN THE VIKING COLD SOLUTIONS TES SYSTEM?
Our Thermal Energy Storage system includes three components:
  • Phase Change Material (PCM)
  • Control System
  • Remote Monitoring & Reporting Portal
4. WHAT IS A PHASE CHANGE MATERIAL (PCM)?
Phase Change Materials (PCM) store and release energy when they transition between their solid and liquid states. While changing phases our engineered PCM absorbs 300 times more heat than food.
5. IS YOUR PHASE CHANGE MATERIAL SAFE TO USE?
All our PCM formulations are comprised of deionized water and inorganic salts. They are food safe, environmentally friendly, non-toxic and non-combustible. The entire system is also 100% recyclable.
6. ARE THERE ANY MECHANICAL PARTS IN YOUR TES SYSTEM?
No. There are no mechanical parts (pumps, motors, actuators, compressors, etc.) in our TES system. They leverage existing refrigeration equipment. The PCM is housed in self-contained cells mounted in stationary positions throughout the facility.
7. WITH WHICH REFRIGERATION SYSTEMS DOES YOUR TES SYSTEM WORK?
Our solution is refrigeration system agnostic and works with any properly maintained system.
8. WITH WHICH CONTROL SYSTEMS DOES YOUR TES SYSTEM WORK?
Our TES system is extremely flexible and can be integrated with any existing control system. We also have our own control system that can drive the refrigeration system in conjunction with our PCM.
9. DOES THE VIKING COLD TES SYSTEM AFFECT OTHER FREEZER COMPONENTS?
No. Our system actually integrates with existing racking systems, does not reduce any storage space, does not limit sprinkler or fire suppression systems, will not affect your commodity classification and will not impede or disrupt any logistical operations in your facility. In fact, the system’s controls and remote monitoring actually improve overall efficiencies and allow for predictive maintenance of other system components.
10. CAN YOUR SYSTEM BE INSTALLED INTO EXISTING FACILITIES (RETROFIT)?
Yes. Viking Cold systems can be installed as a retrofit, refurbishment or in new construction projects. The sooner they are installed, the sooner that facility will start to see reduced energy expenses, improved temperature stability and increased refrigeration system efficiencies.
11. WHAT ARE TYPICAL ENERGY SAVINGS?
Our clients save between 20% and 35% of their energy expenses while maintaining greater temperature stability.
12. DOES THE TES SYSTEM MAINTAIN TEMPERATURE STABILITY?
Yes. Our TES system is engineered to maintain temperature stability within the specific temperature range for each facility; providing fewer fluctuations and a 38% slower rise in temperatures.
13. CAN YOUR SYSTEM PROVIDE THERMAL BACKUP PROTECTION?
Yes. In the event of power outages or equipment failure, we have seen temperatures remain stable three times longer with our TES system installed.
14. DOES THE TES SYSTEM IMPROVE REFRIGERATION EFFICIENCY?
Yes. The Viking Cold system maintains stable temperatures while allowing the existing refrigeration system to be turned off for extended periods of time. When the systems are running, they run at full capacity at times when ambient temperatures are lower, enabling greater refrigeration efficiency and less energy usage. The reduced mechanical run time of the refrigeration equipment also leads to less maintenance and longer equipment life.
15. DOES YOUR SYSTEM INTEGRATE WITH ON-SITE SOLAR POWER GENERATION?
Yes. Our system pairs very well with onsite solar/PV generation to dramatically increase solar ROI. Our solar clients have seen a reduction of 39% annualized energy expenditures and 95% overnight grid reduction, directly addressing grid challenges related to the “duck curve”.
16. HOW LONG WILL YOUR SYSTEM LAST?
The life of the Viking Cold TES system is 20+ years.
17. HAS YOUR TES SYSTEM BEEN APPROVED OR VERIFIED BY ANY OUTSIDE PARTIES?
Yes. Our system installations have been accepted and funded by numerous utilities as part of energy saving incentive programs, as well as being proven effective in a third-party validation study (click here) performed by the California Energy Commission’s Emerging Technology Coordinating Council.

Still have questions about our Thermal Energy Storage solution?
Call +1 832.781.COLD or click for more answers.

Recent Posts From Our Blog
Frozen Food Month: The Path to Growing Sustainably

In recent years the popularity of frozen food has steadily increased in the United States.  However, during the pandemic, frozen food experienced a surge in demand.  The Food Institute reports that frozen food sales increased by 21%, with the pandemic serving as a major contributing factor to this growth.  The pandemic-induced lockdowns and social distancing measures led to significant changes in people's eating habits, and many turned to frozen foods for their convenience, long shelf life, nutritional value, and ability to be stored in bulk. Source: Quartz Despite a steady increase in dollar sales, unit sales of frozen food fell in 2021 and 2022 by 3.2% and 5.1%, respectively, highlighting the potential impact of inflation on frozen food costs, reported the Food & Beverage Insider.  Notwithstanding these declines, unit sales are still higher than they were before the pandemic, demonstrating that the demand for frozen foods remains strong – in part thanks to millennials who have now become frozen food’s largest consumers. According to the Food Navigator, older millennial shoppers, who are approaching the age of 40, represent 48% of the consumers of frozen foods.  This generation prioritizes health and wellness and values a wider range of culinary options that use premium ingredients with fewer additives and preservatives.  Alongside nutrition, they also demand convenience and sustainability in their food choices.  With over 3,700 options in the frozen food section, there is something for every taste and lifestyle, notes the National Frozen & Refrigerated Foods Association. The growing popularity of frozen food has led 29% of consumers to expand their freezer space since the pandemic began, reported the American Frozen Food Institute.  As demand for frozen food products increases, retailers are seeking ways to optimize their freezer sections while also reducing energy consumption for higher quality and more efficient frozen food storage.  Companies like Viking Cold Solutions are helping retailers and distributors to not only improve the efficiency of their cold storage system by up to 50% but also increase facility resiliency.  These advancements indicate a promising and sustainable future for frozen food. With all the demands on consumers’ lives, the greater convenience and quality of frozen foods meet a growing priority.  The frozen food industry now has innovative new technologies to sustainably address consumers’ needs while reducing energy costs.  Given the challenges of inflation and an unstable economy, it will be interesting to observe the further developments of frozen foods and cold storage technologies over the next few years. Learn more about Viking Cold’s sustainable Thermal Energy Storage technology here.

Houston Food Bank Will Feed More with Energy Savings

The Houston Food Bank distributes over 158 million meals every year to people struggling with hunger.  With the help of more than 1,600 community partners to combat hunger and food insecurity, the Houston Food Bank provides individuals with food assistance as well as programs and services targeted at achieving long-term food stability. According to the Houston Food Bank, around 1 million people in southeast Texas are food insecure – 1 in 7 people face hunger as well as 1 in 5 children.  Following the pandemic, food insecurity and unemployment increased dramatically.  53 million people sought assistance from food banks and neighborhood programs in 2021 to put food on their table. To help manage energy costs, the Houston Food Bank is partnering with Viking Cold Solutions and plans to install Thermal Energy Storage (TES) technology in their temperature-controlled facilities.  TES systems are a cost-effective way to store and manage the large amounts of energy required by refrigeration equipment in cold storage facilities. Developed and patented by Viking Cold, the TES system will reduce electrical consumption and demand during peak energy usage hours inside the Houston Food Bank’s cold storage warehouse and will improve temperature stability inside their freezer.  Cold storage facilities, such as frozen food warehouses, have the highest energy demand per cubic foot of any building.  During peak energy use periods, they can account for up to 70 percent of the total electricity bill for organizations. The TES system's energy savings will enable the Houston Food Bank to offer thousands of additional meals every year and feed more people.  Viking Cold’s partnership will help the Houston Food Bank better manage its energy usage by providing cutting-edge technology that will benefit the organization and support its mission for many years to come. Viking Cold Solutions has partnered with food programs across the United States as part of the Feeding America network, the nation’s largest domestic hunger-relief organization.  For more information about Viking Cold Solutions’ Thermal Energy Storage systems, click here.

Case Study: USCS Safely Cuts GHG Emissions While Reducing Electrical Costs

Situation: United States Cold Storage (USCS) is one of the top refrigerated warehousing and related logistics services companies operating throughout North America.  Their Tulare South facility is a 116,482 square foot frozen food warehouse located in the agriculturally focused Inland Empire of Southern California.  The state of California has committed to reaching a goal of 100% renewable and zero-carbon electricity by 2045, and USCS is just as committed to reducing their energy usage. To help California meet its energy demand reduction goals, USCS set out to focus on energy efficiency and better temperature control in their energy-intensive warehouses. Challenge: Operations managers at USCS face daily energy use challenges.  To help alleviate these issues, USCS chose their Tulare South location to explore options with energy-saving technologies.  The goals were to safely meet California's energy demand reduction initiatives by lowering demand and greenhouse gas (GHG) emissions while also addressing energy-use concerns, decreasing costs, and increasing sustainability and resiliency. Solution: USCS adopted Thermal Energy Storage (TES) technology to reduce their carbon footprint and lower their energy costs.  Viking Cold Solutions installed energy meters, sensors, and controls throughout Tulare South’s temperature-controlled warehouse to monitor its operations and performance.  Viking Cold then installed energy storage modules containing environmentally friendly Phase Change Material (PCM) which, when combined with cloud-based optimization algorithms, allowed Tulare South to control when and how it uses and procures energy.  The facility's digitization, energy storage, and cloud-based optimization allows Viking Cold to continuously assess and improve the performance of USCS’s frozen food warehouse. Outcome: By utilizing Viking Cold's TES technology and optimization services, USCS lowered Tulare South’s peak period demand by more than 30% and refrigeration energy consumption by 25%, resulting in an annual carbon footprint reduction of over 350 tons at this facility.  The frozen food warehouse not only increased energy efficiency but also increased temperature stability in the freezer by over 40%, better protecting the food. Operators of cold storage facilities, businesses with refrigeration loads, and utilities that need to control peak demands on the electrical grid all stand to gain significantly from Thermal Energy Storage.  USCS Tulare South is a prime example of how TES technology effectively lowers energy demand and consumption while improving temperature stability in cold storage facilities.  As a result, operational costs are reduced, product is protected, and environmental effects are minimized. For a more detailed account of Thermal Energy Storage and its benefits, download the USCS Tulare South Case Study.  

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