solar central combi solutions
DESCRIPTION
Advantages & Benefits with combined heating & tap water systemsTRANSCRIPT
Heating & Cooling Systems
Business Centre Heating & Cooling Systems
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Renewable Energy
Renewable Energy Heating & Tapwater comfort
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Renewable Energy
Minimum use of fossil energy by maximum use of renewable (solar ) energy
Maximum comfort level for space heating (constant temperature)
Maximum comfort level for tap water consumption (short time constant)
Individual billing per apartment
Space saving units (less than 0,15 m3)
Flexible installation of the unit gives the architects and designers more possibilities (compare with individual gas boilers were gas pipes and chimneys limits the creativity)
No open flame
No sound
Central unit s that are easy to install & maintain
Optimum interaction between solar system and complementary heating source
Advantages & Benefits with combined heating & tap water systems
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Renewable Energy
Sun Solar Collector Energy Storage
Supplementary heating source
Local Distribution
System Heating Unit
Appartment Heating & Tapwater System
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Renewable Energy
Alfa Laval Products
Mini City Direct STC
Alfa Store
Maxi
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Appartments/Single family houses Single family houses/Multi family houses
Renewable Energy
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Sucess factors for Renewable systems
Low return temperature from heating system
Reduce peak loads for heating as much as possible
Accurate tap water control
Idle function for saving water & energy
Low return temperature from hot water system
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Sucess factors for Renewable systems
Low return temperature from heating system
Under floor heating provides a very high comfort level. The whole floor area is warm and all the surrounding surfaces will obtain radiant heat which increases their temperature. Modern floor heating systems are based upon light pipes of plastic, which can be manufactured and handled in substantial lengths. The most common pipe material is cross linked polyethylene, PEX, with an external diffusional barrier, which on the whole eliminates any penetration of oxygen through the pipe wall. The coils emanate from centrally placed distributors.
The coils are often cast into concrete, and there must always be an insulation under the coils in order to reduce the heat emission downwards. Each room should have its own coil to make it possible to control the heat supply to the room. Floor heating emits, at a room temperature of 20ºC, about 11 W/m 2 floor area and per ºC temperature difference between the floor surface and the room air. The temperature of the floor surface should not exceed 27ºC if you are going to stay on the floor for a long time. The required flow temperature is low, often not more than 40ºC, and the temperature drop across the coils is calculated to be between 5 and 10ºC.
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Sucess factors for Renewable systems
The control of the room temperature is made with an electric thermostat, opening and closing a control valve via a thermo-hydraulic motor. The electric thermostat contains an electric resistance, which is activated when the thermostat opens the control valve. The resistance emits heat in the thermostat, which after a while, believes that the room temperature has increased and closes the control valve. This type of on-off control has proved to be very efficient in the use with floor heating.
The supply temperature is controlled by an indoor and/or out door temperature sensor to optimize the supply temperature to be as low as possible. This will flatten out the on-off control of the capacity demand to become as stable as possible from the under floor heating system.
Low return temperature from heating system
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Sucess factors for Renewable systems
To reduce peak flow as much as possible, the capacity to the heating circuit should be dynamic dependent on the need of capacity.
Avoid on/off control for each satellite. This will just create peaks and valleys that will cause distribution problems for the heating source and the distribution system.
This is solved by a modulating controller using an indoor and/or out door temperature sensor to optimize the supply temperature to be as low as possible.
The low supply temperature will cause a stable indoor temperature were each room controller works in on position more or less constantly.
Reduce peak loads for heating as much as possible
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Sucess factors for Renewable systems
Tap water should be supplied with a demanded stable temperature with a specific flow at a specific time during a demanded time!
Alfa Laval CB20IS a premium patented tap water solution.
Integrated sensor technology
Extremely short time constant
Designed for high pressure & low pressure systems
Designed for high temperature & low temperature systems
Designed for best performance and lowest possible life cycle cost
Accurate tap water control
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Sucess factors for Renewable systems
Built in idle function to keep the satellite ready for tap water production 24-7
Idle function saves water due to that it is ready to produce tap water on demand
No over heating with idle function
Acts on demand
Adopts to any system supply type, independent of temperature and degree of insulation.
Idle function for saving water & energy
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Sucess factors for Renewable systems
Efficient and compact heat exchanger
Extremely low return temperature
Low return temperature from hot water system
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Sucess factors for Renewable systems
Simulation of hot water use for 24 appartments (no heating in use)
Low return temperature from hot water system
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Sucess factors for Renewable systems
Simulation of hot water use for 24 appartments (no heating in use)
Low return temperature from hot water system
www.alfalaval.com
Sucess factors for Renewable systems
Low return temperature from heating system
Reduce peak loads for heating as much as possible
Accurate tap water control
Idle function for saving water & energy
Low return temperature from hot water system
www.alfalaval.com
Sucess factors for Renewable systems
Example1
Return temperature is 55 degrees from the distribution system.
Temperature in the solar tank is 55 degrees.
Demanded supply temperature to the distribution system are 65 degrees.
The return temperature impact on the solar system
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Heating Systems
Appartments/Single family houses Single family houses/Multi family houses
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100% of the energy use will be added from the gas boiler
0% of the energy use will be added from the solar system (waste of money)
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Sucess factors for Renewable systems
Example2
Return temperature is 25 degrees from the distribution system.
Temperature in the solar tank is 55 degrees.
Demanded supply temperature to the distribution system are 65 degrees.
The return temperature impact on the solar system
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Heating Systems
Appartments/Single family houses Single family houses/Multi family houses
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1/4 of the energy use will be added from the gas boiler
3/4 of the energy use will be added from the solar system
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Sucess factors for Renewable systems
Example3
Return temperature is 25 degrees from the distribution system.
Temperature in the solar tank is 70 degrees.
Demanded supply temperature to the distribution system are 65 degrees.
The return temperature impact on the solar system
www.alfalaval.com
Heating Systems
Appartments/Single family houses Single family houses/Multi family houses
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0% of the energy use will be added from the gas boiler
100% of the energy use will be added from the solar system
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Heating Systems Complete installation package – Tap water and space heating
Plug & Play- Easy to install, start up and maintain
Space saving design – Small size and low weight
Word class tap water control - Equipped with Alfa Laval patented Integrated Sensor solution
Low energy usage for tap water production - With idle function for reduced use of water and protection against legionella
Energy saving indoor climate control – Controller with modulating control for stable and accurate indoor temperature. Uses outdoor & indoor temperature sensor for best performance. Keeps the use of energy for heating at a stable level that takes away unwanted energy peeks.
Low energy leakage from the unit – Insulation directly on pipes and heat exchangers. We avoid heat transfer at the source, this reduce even the risk of growth of legionella. Components like valves and pumps left uninsulated for easy inspection .
Long life acid proof stainless steel piping for bacteria free tap water.
Reduces the use of energy – Connection for individual measuring of use of energy
Keeps the consumption of electricity to a minimum – Using A-class circulation pump and climate controller with automatic shut-down function. This in combination with the Alfa Laval patented self acting IS tap water controller that are free from consumption of electricity
Mini City Direct STC
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Heating Systems Complete installation package – Transfer heat from primary media and complement the solar panels with capacity when needed.
Plug & Play- Easy to install, start up and maintain
Space saving design – Small size and low weight
Low energy usage – Support with capacity just in case if the capacity needed can not be supplied by the solar system.
Energy saving control – Controller with modulating control for stable and accurate supply temperature. Minimize the flow for the primary side meda and guarantees the lowest possible return temperature .
Use of energy – Connection for individual measuring of external use of energy from the primary media.
Keeps the consumption of electricity to a minimum – Using A-class circulation pump with possibility to run the circulation pump for best performance and lowest possible use of energy.
Maxi
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Heating Systems Complete installation package – Optimizes and put priority to the use of solar
energy
Plug & Play- Easy to install, start up and maintain
Space saving design – Small size and low weight
Low energy usage – Optimizes and put priority to the use of solar energy. Support with capacity just in case if the capacity needed can not be supplied by the solar system.
Energy saving control – Controller with smart software included for best performance of solar systems. Minimize the use of additional energy source.
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