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Heating & Cooling Systems Business Centre Heating & Cooling Systems

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Advantages & Benefits with combined heating & tap water systems

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Page 1: Solar Central Combi Solutions

Heating & Cooling Systems

Business Centre Heating & Cooling Systems

Page 2: Solar Central Combi Solutions

www.alfalaval.com © Alfa Laval Slide 2

Page 3: Solar Central Combi Solutions

www.alfalaval.com

Renewable Energy

Renewable Energy Heating & Tapwater comfort

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Page 4: Solar Central Combi Solutions

www.alfalaval.com

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

Page 5: Solar Central Combi Solutions

www.alfalaval.com

Renewable Energy

Sun Solar Collector Energy Storage

Supplementary heating source

Local Distribution

System Heating Unit

Appartment Heating & Tapwater System

Page 6: Solar Central Combi Solutions

www.alfalaval.com

Renewable Energy

Alfa Laval Products

Mini City Direct STC

Alfa Store

Maxi

Page 7: Solar Central Combi Solutions

www.alfalaval.com

Appartments/Single family houses Single family houses/Multi family houses

Renewable Energy

Page 8: Solar Central Combi Solutions

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

Page 9: Solar Central Combi Solutions

www.alfalaval.com

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.

Page 10: Solar Central Combi Solutions

www.alfalaval.com

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

Page 11: Solar Central Combi Solutions

www.alfalaval.com

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

Page 12: Solar Central Combi Solutions

www.alfalaval.com

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

Page 13: Solar Central Combi Solutions

www.alfalaval.com

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

Page 14: Solar Central Combi Solutions

www.alfalaval.com

Sucess factors for Renewable systems

Efficient and compact heat exchanger

Extremely low return temperature

Low return temperature from hot water system

Page 15: Solar Central Combi Solutions

www.alfalaval.com

Sucess factors for Renewable systems

Simulation of hot water use for 24 appartments (no heating in use)

Low return temperature from hot water system

Page 16: Solar Central Combi Solutions

www.alfalaval.com

Sucess factors for Renewable systems

Simulation of hot water use for 24 appartments (no heating in use)

Low return temperature from hot water system

Page 17: Solar Central Combi Solutions

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

Page 18: Solar Central Combi Solutions

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

Page 19: Solar Central Combi Solutions

www.alfalaval.com

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)

Page 20: Solar Central Combi Solutions

www.alfalaval.com

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

Page 21: Solar Central Combi Solutions

www.alfalaval.com

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

Page 22: Solar Central Combi Solutions

www.alfalaval.com

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

Page 23: Solar Central Combi Solutions

www.alfalaval.com

Heating Systems

Appartments/Single family houses Single family houses/Multi family houses

°

°

°

0% of the energy use will be added from the gas boiler

100% of the energy use will be added from the solar system

Page 24: Solar Central Combi Solutions

www.alfalaval.com

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

Page 25: Solar Central Combi Solutions

www.alfalaval.com

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

Page 26: Solar Central Combi Solutions

www.alfalaval.com

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.

Alfa Store