ENERGY SAVING & INCREASED COMFORT
HYDRONIC BALANCING OF HEATING & COOLING SYSTEMS
This is how you detect systems out of balance
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It takes a long time before all rooms reach the correct temperature when starting up after night or weekend lowering.
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Energy consumption becomes abnormally high.
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Tenants complain that it is too hot or cold.
Guideline values for energy saving
Depending on the status of the system, energy use can be reduced by 10 – 30%
Heating system: 10 – 15%
Cooling system: 15 – 20%
A degree above 20 C increases the heating cost by 5 – 8 %
A degree below 23 C increases the cooling cost by 15 – 20%
Energy saving project
In February 2008, the Swedish property owner SABO started an initiative with a focus on reducing energy consumption by 20% during the period 2008 – 2016.
For the entire period 2008 – 2016, the 105 property companies with approximately 400,000 apartments reduced consumption from 153 kWh per square meter & year to 127 kWh per square meter & year, approximately 17%.
A total of 4.7 TWh of energy was saved over the nine years.
The end result was a saving of 0.84 TWh per year, (839 GWh per year) i.e. over SEK 800 million per year.
A total of approximately 8.1 TWh up to today, which corresponds to a saving of approximately SEK 8 billion.
The companies have listed their most profitable measures;
Commissioning the heating and ventilation system, and lowering the average temperature over the property
Install heat pumps
Adjust operating times and control of fans
Recovery of ventilation heat
Additional insulation, walls, attic & roof
Electricity efficiency, lighting, laundries, etc
Property portfolio
The energy savings of a property portfolio depends on a number of conditions, for example the current status (kWh/m2, year), the price of energy and the extent of the reduction. The diagram gives an approximate picture of what can be achieved in terms of annual savings.
At an energy price: 0.1 € / kWh
Property portfolio with 250,000 sqm – Annual savings 350 000 – 600 000 €
Property portfolio with 700,000 sqm – Annual savings 800 000 – 1 500 000 €
Property portfolio with 2,550,000 sqm – Annual savings 3.0 – 5.0 million €
At an energy price: 0.3 € / kWh
Property portfolio with 250,000 sqm – Annual savings 1.0 – 1.8 million €
Property portfolio with 700,000 sqm – Annual savings 2.5 – 4.2 million €
Property portfolio with 2,550,000 sqm – Annual savings 9.0 – 15.0 million €
Hydronic Balancing Method
All large systems contain some degree of complexity, when the flow is adjusted in a balancing valve, the pressure drop will change in the valves and pipes, affecting the differential pressure across the balancing valves elsewhere in the system. When the flow is adjusted on a valve in a branch, the flow in other valves that have already been adjusted, will also change.
There is a need for a robust method, a work schedule.
Static valves – Hydronic Balancing of systems
Dynamic Valves – Hydronic Balancing of valves
Proportional method
All correct working methods for balancing a system are based on a Proportional Method. All terminal units, branches and risers are balanced to the same proportion or ratio of the calculated flow. When the total flow is adjusted at the pump, all units will have the correct flow.
Commissioning with the Proportional Method
Proportional adjustment is a work schedule on how the measurements of a flow system should be carried out. The methodology is based on repeating a few steps successively in a loop through the flow system.
The work can be carried out significantly more efficiently if two measuring sensors are used, one sensor at the reference valve and one sensor that is moved between the terminal valves.
Heliomotion PV-4
- Automatically finds the sun’s position using GPS.
- Following the sun in two axis with only one motor.
- Rotates 180 degrees along the horizon, 20-70 degrees vertically.
- Low energy consumption and reliable operation.
Modell 1: PV-4M
- Rated power: 1200 watt
- Panels: 4x Maysun 300W
- Electricity production: 1400-2700 kWh/year
Modell 2: PV-4
- Without solar panels. For those who want to use their own panels.
Heliomotion PV-6
- Automatically finds the sun’s position using GPS.
- Following the sun in two axis with only one motor.
- Rotates 180 degrees along the horizon, 20-70 degrees vertically.
- Low energy consumption and reliable operation.
Modell 1: PV-6M
- Rated power: 1800 watt
- Panels: 6x Maysun 300W
- Electricity production: 2100-4000 kWh/year
Modell 2: PV-6
- Without solar panels. For those who want to use their own panels.
Heliomotion Manual En PV6
Solar Tracker Manual En 2019 2
Solar panel
Model 1: Maysun Solar
- Rated power: 300 watt
- Module efficiency: 18.4%
- Weight: 18 kg
- Size: 1640x992x35mm
Grid-tied microinverter
- Model: Kaideng WVC-600
- Type: 1-phase grid-tied microinverter
- Capacity: 2 panels, up to 300 watt each
- Noise level: Fanless
Wvc 600 Datasheet
Wvc 600 Manuall
Kaideng Certificates
Kaideng Emc Report
LVD Report Kaideng Sr En 60950 1 Report
How does a Solar Tracker track the sun?
How much does tracking increase electricity production?
How is the Solar Tracker powered?
How much wind load is the Solar Tracker designed to handle?
The Solar Tracker is engineered to withstand high wind loads and even the largest PV-6 system can resist wind speeds up to 30 meters per second – equivalent to 67 miles per hour. Should you expect winds in excess of this, it is recommended that you use the provided extension rod to tilt the panels horizontally. This will protect the installation until the storm passes, as this is the optimum position for the installation to resist high wind loads. PV-6 units in the field have survived wind speeds up to 42 m/s, but we do not recommend installations where wind speeds beyond 30 m/s is common.
How does snow impact the performance of the Solar Tracker?
Does the Solar Tracker work in dry regions?
Can the tracker be reconfigured?
How long is the design life and warranty of the product?
The Solar Tracker is designed to last for as long as the panels last, typically 25-40 years. We give a 3 year warranty to provide free replacement parts. The warranty appears on the last page of the manual.
The Maysun panels have a 12 year product warranty guarantee on materials and workmanship, and an 80% output guarantee after 25 years.
How far away can a Solar Tracker be placed?
Should I choose a grid-tied or a battery-tied system?
Typically, you want to use a grid-tied system if utility power is available, because it has a lower cost and it allows you to automatically utilize 100% of your produced electricity. The surplus electricity not consumed by your household will be sold to the grid.
Battery-tied system are most often used for off-grid installations when there is no access to utility power. They can also provide backup power during blackouts and allow a greater proportion of generated solar energy to be consumed within the household. When considering a battery-tied system it’s important to keep in mind that generated solar energy that is not consumed will be discarded when the batteries are full. Therefore, to make full use of a battery-tied solar system it should be paired with reoccurring daily loads, such as a heat pump or an electric vehicle.
How much battery capacity should I have for an off-grid system?
Since batteries are expensive, storage capacity is an important issue. We offer deep-cycle GEL batteries by default because of their many benefits compared to standard lead-acid batteries.
For backup purposes and cabins without access to a fixed power grid, we recommend at least 5 kWh GEL battery capacity (4pcs 12V x 110Ah battery). Larger needs are usually combined with a larger Heliomotion and a larger battery bank. We typically recommend 5 kWh for PV-2M/3M, 10 kWh for PV-4M and 15 kWh for PV-6M. This allows storage of about half a day’s solar energy.
Which battery type should I use?
We recommend the deep-cycle GEL batteries. They are maintenance free, can be used indoors, have a long lifetime, and are made to withstand deep discharge cycles. They are ideal for solar battery systems.
What is the noise level generated by the system?
The grid-tied microinverters are fanless and make virtually no noise. The battery-tied solar stations have fans which kick in progressively as the inverter load increases, so it should be placed somewhere where the sound doesn’t bother anyone, such as a garage, a shed or a cabinet.
The solar tracker itself is very silent. Listening carefully right next to the tracker, it makes the sound of a distant cicada every 7 minutes or so when it updates its position.
Is it possible to fit solar thermal collectors on the tracker?
What is included in the package?
Can a Solar Tracker be installed on a roof?
What happens during a blackout?
How do I use the power from a battery-tied inverter?
How long do the batteries last?
The GEL battery is durable and has a design life of up to 12 years. Each charge/discharge cycle reduces the maximum capacity of a battery, more so the deeper the cycle is. After 750 cycles that are 50% deep, or 1800 cycles 30% deep, a GEL battery will have lost 20% of its maximum capacity. This is called one service life.
When the capacity has fallen beyond what you are willing to accept, it is time to replace the battery. This is usually after two service life cycles have been consumed. So if the average cycle per day is 3% deep then the battery can be considered exhausted after 3600 cycles or 10 years. Keep in mind that GEL batteries must never be left in a discharged state for any longer periods as that will reduce their maximum capacity.