New FIS guideline for salting of ski jump hills
The FIS ski jumping committee has released a new guideline for how to best salt or fertilize snow in soft and wet snow conditions. The document is based on FIS’ own salting guideline for Cross-Country courses, and includes more details, photos and information specific to ski jumps.
The document can be downloaded here or found on the home page top menu under “Literature”.
Finland on the forefront of snow storage
While the glaciers are melting around the World, Finland is building new ones. A Scandinavian delegation recently visited Levi and learned how Finland over many years has built competency and snow depots to secure early season openings and snow guarantee for their World Cup events. What they have achieved in Levi in the middle of flat Lapland is no less than exceptional! Here they go for it with a Finish sisu! The snow storage is over 200 000 cubic meter large and distributed along the courses, ready to welcome skiing tourists and National Teams from all over Europe. The insulation material Finnfoam may become the new buzzword for everyone thinking about snow storage in the future. This is without doubt a solution for the future where cooperation across borders will benefit our ski sport.
Utilizing waste heat from snow production process as heat supply to nearby buildings
The SINTEF Energy research team is presenting ways to create snow in warm temperatures while optimizing the energy consumption.
This research memo presents a case study evaluating temperature independent snow (TIS) production as a component in an integrated energy concept. This concept utilizes waste heat from the snow production process as heat supply to buildings. A borehole thermal energy storage (BTES) was also a part of the integrated energy system. The BTES would be charged during the TIS machine’s operation time and discharged when the machine is not producing snow. Different production strategies were investigated where among others the energy efficiency was assessed. Four different cases were evaluated using a TIS machine with different approaches. The amount of snow produced laid between 14 600-20 000 m3. A utilization rate based on the produced heat was estimated to range from 67-95 % for the different cases. By integrating the snow production and building heating system, energy savings up to 131 MWhel or 31 % was obtained. The size of a possible BTES would range from 16 to 57 boreholes depending on when during the year the snow was produced.
SINTEF Energy Research is part of the Snow of the Future project
Closing Seminar for phase 2 of the Snow for the Future project
The closing seminar for the research project “Snow for the Future” was held on October 26th, 2022 at Granåsen Sports Park in Trondheim, Norway. The seminar gathered experts within R&D and Universities, Skiing Federations, Site developers and industries. Also present was the constituted CEO/Sport Director for the FIS Nordic World Ski Championships (WSC) Trondheim 2025, Kristin Mürer Stemland. She presented the high ambitions that WSC Trondheim 2025 aim for, such as efficient and climate friendly snowmaking included in their Snow safety plan.
Topics like temperature independent snowmaking, snowmaking from surplus heat, energy efficient and integrated energy solutions for snowmaking are a few of the research areas covered in the workshop.
The presentations and videos from the seminar can be downloaded here (see also the “Seminars” optionn on the top menu on our homepage).
Coping with increased cost of making snow
Due to increasing average temperatures in many areas of the World, snow production is now a necessity at most ski resorts. Snow production requires, in most cases, high amounts of electricity for pumps, compressors and snow fans. With the high cost of electricity in Europe this year, there has been a clear focus on how to optimize the snow production.
There are a few obvious ways of reducing electricity costs, for example by using a water source (lake or reservoir) that is higher in elevation than where the snow is produced. In this way gravity will create parts of the water pressure that is required for a snow fan to work, thus decreasing the size of and electricity needed for pumps.
Other potential cost saving measures is to use additives that will increase the amount of snow that is otherwise produced with a fixed amount of water. A water additive can raise the temperatures at which water begins to freeze thus causing water to convert from liquid to solid faster and closer to the nozzle of the snow guns.
A short-term snowmaking study (side-by-side test) conducted at the Kirkwood Ski Resort in 2014 by the Vermont Energy Investment Corporation and analyzed by the Brendle Group engineering company showed significant benefits by using water additives:
• The overall volume of snow produced increased almost 90%
• Water consumption decreased by 45%
Such results will obviously cause significant savings in energy, water and capital cost.
A summary of the Snowmaking study can be found here.
US and Canada opens for skiing early this year
The Western area of US and Canada are experiencing a great early start of the ski season 2022/23. The former Olympic Nordic venues in Salt Lake City, Whistler/Vancouver and Canmore are either already making snow or have opened for excellent groomed skiing due to both snowfall and cold temperatures (see photos).
Snow guarantee for skiing events – an overview
In today’s challenging climate there are still ways to guarantee snow, even when the temperatures are not conducive to freezing at the competition venue. The hard part is to do this in a sustainable and climate-friendly way, and without too much cost.
Below is a list of seven different ways of covering the competition venue’s courses or slopes (in the event lingo called Field of Play – FOP), with snow. Only the first two methods require local temperatures below freezing. This list may also be ranked in terms of cost (money and labor). The majority of the methods would need to transport snow onto the FOP, and must therefore use additional resources (fuel, etc.)
- Natural snow fall
- Traditional snowmaking with snow fans or snow lances
- Collecting ice, then crushing this to “become” snow
- Using snow stored from last winter
- Making ice or snow with temperature-independent machines
- Making snow inside tents, buildings or tunnels where the temperature is cooled down sufficiently for snow fans or snow lances to work
- Transport snow from high mountain locations
Using ice to ski on
Using ice to ski on
The two first methods on the list above do not need any further explanation. However, as the third method suggests, several large ski organizers have used ice instead of snow for all or parts of their courses for international skiing competitions, even at a World Cup level. Well known Cross-County World Cup venues such as Holmenkollen and Rybinsk have tried this, and several of the Chinese Cross-Country venues pre-Olympics 2022 used crushed ice that was tilled down with the grooming machines.
Holmenkollen collected ice shavings from a couple of the Oslo city’s ice rinks to mend a few thin spots on their 50 km course, while the World Cup organizer in Rybinsk transported large ice-cubes from the nearby rives and drove snowmachines across the ice around their 2.5 km course until the surface looked and felt like snow. In China, both at venue and training centres, ice cubes from mountain lakes were transported, then crushed before pushed out and groomed.
Almost all ski event organizers would like to know and say long in advance of the event that they can absolutely guarantee sufficient and safe snow coverage for their competition courses. But, due to challenging weather and climate the last few years, very few organizers can with ease do this anymore. Snow guarantee has become an increasingly important element in event and venue planning and budgeting. This website will in the next few articles explore how different organizers have in the past and are currently solving the challenge.
To be able to host a World Cup, World Championship and Olympic & Paralympic Games, the organizer or venue must have or install an efficient snowmaking system or/and provide sufficient snow storage that can be proven to provide enough snow to cover the homologated /certified competition courses (called Field of Play in the Olympic lingo). The last known organizer that got away without having this was the 2010 Olympic and Paralympic Organizer in Vancouver who could provide 30 years’ records of snow-depth that showed an average depth of 2.62 meter snow on the Cross-Country and Biathlon stadiums during the Games time in February. The Games were held on 1.5 meter deep natural snow.
Most organizers of high-level ski events today have some kind of traditional snowmaking system in place. This consists of snow fans or/and snow lances that create mounts of snow along the competition courses or hills or that are created in a central location and transported out or on to the courses/hills. An increasing number of venues are now supplementing their traditional snowmaking system with snow collected at the end of the last season and stored over the summer.
There are however a few other ways of guaranteeing or providing snow to ski on. Remember, snow is frozen water, and several venues and event organizers have explored and are using creative methods for their events. We will cover some of these in the next articles.
This web-site and Snow for the Future are partnering with the venue and organizer for the 2025 Nordic World Skiing Championship in Trondheim, Norway in creating a plan for how to guarantee snow for this low-altitude venue. In the next years leading up to the Championship, we will cover the details of the plan as well as how it was implemented.
Idrefjell getting ready for next season already
Idrefjell in Sweden is already now in May ensuring that next ski season can open in October. Photos taken from their web site (http://www.idrefjall.se/)
Comparison of a plate- and flake ice machine for snow production (SINTEF Energy)
Due to climate change, there is an increased interest in technologies for producing snow at ambient temperatures above zero, so called Temperature Independent Snow (TIS) production. This study compares two such technologies; a plate ice machine, originally developed for ice production to the fishing industry, and a flake ice system already installed at several ski locations. Since TIS production technologies are more energy demanding than conventional snow production systems, such as snow guns and lances, the comparison was focused on energy consumption.
When comparing energy usage of various technologies, it is important to compare data for the same operating conditions, i.e., ambient temperature and feed water temperature. The flake ice machine allows operation between -5°C and +25°C ambient temperature, and a feed water temperature between 5°C and 20°C, but the energy usage is only presented at 15°C and 5°C (design point), respectively. As seen in the table below, at that operation point the energy use for the plate ice is very similar.
|TIS machine||Refrigerant||24 h snow production||Power consumption|
|Plate ice machine||R717||20||39||46.8|
|Flake ice machine – stationary||R717||45||90||48.0|
|Flake ice machine – stationary||R717||95||185||46.7|
|Flake ice machine – mobile||R449a||45||130||69.3|
Operating window: The value of offering a wide operational window versus a higher, and more constant, energy efficiency should be considered. Also, the most probable operating condition for market introduction should be identified to optimise the design, i.e., minimise the energy usage.
Heat recovery: To recover waste heat from the snow production process is an energy efficient solution for installations with a nearby heating demand. Such a concept is available for the plate machine.
Efficient storage: To store the produced snow as ice plates, and crushing it before usage, could enable a more efficient storage due to a slower melting process. Thus, it can be stored at higher temperature for the same time period, or at a lower temperature for a longer time period.
Author: Cecilia Gabrielii, SINTEF Energi
- New FIS guideline for salting of ski jump hills
- Finland on the forefront of snow storage
- Utilizing waste heat from snow production process as heat supply to nearby buildings
- Closing Seminar for phase 2 of the Snow for the Future project
- Coping with increased cost of making snow
- US and Canada opens for skiing early this year
- Snow guarantee for skiing events – an overview
- Snow guarantee
- Idrefjell getting ready for next season already
- Comparison of a plate- and flake ice machine for snow production (SINTEF Energy)