District Heating

"District heating is efficient utilization of surplus energy from various industries, waste incineration, forestry, sea, biogas and landfill - energy that would otherwise be wasted"

District heating therefore has a key role in our joint fight to reduce emissions of greenhouse gases. Our joint obligations to reduce our own climate footprints can be found in a global perspective in relation to the Paris Agreement, through municipal energy action and climate plans, as well as right down to the individual building and business level.

With SASTECH, this energy can be transferred and sold as heat through a district heating network or cooling via a district cooling network, to homes and commercial buildings in our society. Commercial buildings and industry can transfer their surplus energy back into the same grid.

District heating can be used for more than industrial heating and cooling. Street heating, building heating and appliances are also good areas of use. By replacing electricity as an energy source, district heating contributes to freeing up capacity in the power grid. District heating therefore has a central role in the transition to a more circular economy.

Thermal Energy Storage

Thermal energy storage provides a clean, efficient and flexible way to store heat

Thermal energy is used to produce electricity, heat buildings, as hot water, and to drive industrial processes. It is crucial to utilize this energy in a sustainable way in order to reduce our footprint on the environment and ensure a more sustainable future.

We have a high level of expertise in utilizing waste heat and bioenergy, and can help to identify the most sustainable and economical solutions for energy storage or cooling. Our energy wells can utilize geothermal heat, cooling, and our energy centers are tailored to meet specific energy needs.

Indoor Climate

"Digital climate control that adapts the air quality and heat balance in the building, reducing energy use without compromising the indoor climate"

It's important to continuously adjust the indoor climate as needed based on real-time data to achieve maximum energy savings. This is where SASTECH's unique management strategy comes into play. Our demand controlled systems balance air and heat using advanced sensors that measure the quality of air and the heat balance in the building. This data is sent to the SASTECH Cloud where our energy experts, in interaction with our management strategy, optimize the result.

It's not enough to simply install a demand controlled climate system if you want a system that contributes to a good indoor climate and optimal energy use. The most important thing is to look at the whole picture to regulate the climate in real-time according to actual need. This is an important reason why many people do not achieve their desired energy savings or a satisfactory indoor climate. SASTECH's Digital Management Strategy solves this problem and unlocks significantly greater savings opportunities over time.

Regulating air volume

The sensors provide direct feedback on whether the amount of air is sufficient in relation to the need and whether the regulation works as intended. Our sensors measure presence, temperature and pollutant concentration, such as CO2. With demand control, the air volume is regulated using either pressure control or damper optimization. System structure, fan regulation and regulation of the ventilation system are different for pressure controlled and damper controlled systems.

Optimal heat regulation

In order to achieve optimal heat regulation, SASTECH is totally dependent on an overall energy management strategy in the building, as well as generating forecasts based on advanced factors such as weather forecasts from Yr and spot price forecasts from Nordpool. In order to achieve maximum energy savings, it is not sufficient to simply react to real-time data, but it is necessary to anticipate future needs, electricity prices and the weather outside the building.

Heat Recovery

At least 80 % recovery!

Heat in used air is transferred to fresh air with the help of a heat recovery unit, and this lowers the energy requirement for heating. The heat recovery unit only transfers heat, and mixes fresh air and used air to a very small extent. The requirements for our energy efficiency are based on at least 80% annual average efficiency. In addition to heat recovery, the ventilation units can have an after-heating battery (electric or water-based) so that the temperature can be raised to the desired level.

Since the ventilation system has a common air intake, fresh outside air can be filtered there before it is preheated and sent into the building.

The main advantage is that it gives the building a better indoor climate because the used air is continuously extracted and replaced with fresh, purified air. Since approximately 80 percent of the heat energy from the exhaust air is recovered, it is also an energy saving solution. For us at SASTECH, an efficiency of 80% is still not enough. By developing a ventilation unit with a built-in heat pump, the result has been an extremely energy-efficient solution. The genius part is that you get two separate systems for heat recovery:

First, the heat is recovered in the exhaust air heat pump, and then in the rotating heat exchanger.

In this way, the heat energy of the air is recovered, instead of it being wasted. The annual efficiency of the heat recovery of the ventilation unit can thus reach over 90%, and combined with the heat pump's heat factor (COP = 3 – 4.5), the result is an excellent energy-saving system.

"It gives results you should notice - regardless of whether you are going to build a new building or upgrade your existing building"

Gas & Oil Burners

We reuse and optimize

Considerable quantities of gas and oil are used for heating by companies, this is both expensive and not very energy efficient. Our energy specialists optimize and reuse the systems in a more efficient way, as long as the plant works it will remain operational and be implemented in our energy management strategy. This means that it's used either as peak load or back-up.

It's smart to stop burning oil altogether in some cases, but that doesn't mean the oil tank itself is not still useful! We specialize in installing renewable heating solutions and with such a large tank it is possible to clean it of oil and then fill it with water. We then connect a heat pump and reuse the entire tank as a thermal energy storage system.

Learn more about this from our project manager Pål Solberg

Heat Exchanger

A heat exchanger is a device that makes it possible to transfer heat between two liquid or gas streams with different temperatures. Our heat exchangers can be used in both heavy and light industry, for exchanging energy both in freezer warehouses and for heating larger buildings.

How does the heat transfer work?

The heat transfer takes place by directing one flow through parallel pipes which are surrounded by other pipes in a cross section. To achieve a good heat exchange, the flow should be so fast that it becomes turbulent. The heat exchanger can also consist of just one pipe where the two components are alternately fed in, while the heat is stored in the pipe walls. If the components are not miscible, they can be allowed to flow past each other in direct contact, for example gas bubbling through a liquid. The challenge is to achieve the highest possible efficiency with the lowest possible pressure drop.