Sí-ELB-1000 – Construction plan for passive ground-source heat storage system DE

Sí-ELB-1000 – Construction plan for passive ground-source heat storage system

The Sí-ELB-1000 construction plan describes the construction of a compact underground heat storage system for greenhouses and cold frames.

The building plan contains

• Assembly instructions (39 pages)
• System principle and technical fundamentals (42 pages)
• Operator manual (7 pages)
• Graphics and technical illustrations

Total scope: approx. 90 pages of system documentation

The Sí-ELB-1000 is designed for greenhouses with an area of ​​approximately 6–20 m² and stabilizes temperatures there throughout the year.

Additionally, the system can be used as a natural cold storage facility.
By utilizing the earth's air and the thermal mass of the storage system, storage temperatures in the range of approximately 8–12 °C can be achieved.

This makes the system suitable for cold storage areas of approximately 6–20 m², for example for:

• Vegetables
• Fruit
• Seeds

The operation takes place without electrical energy and without active heating , as it relies exclusively on...

• thermal mass
• Earth temperature
• natural airflow

can be used.

The underlying principle can, in principle, also be used in larger buildings or residential buildings. In these cases, however, adapted technical designs and larger storage dimensions are required, which will also be offered in the future.

System principle

Compact underground heat storage system for greenhouses for year-round temperature stabilization without electricity or heating.

The system uses a mineral sand reservoir in combination with ground air and passive airflow.

The storage unit stabilizes temperatures in the greenhouse and can compensate for temperature fluctuations between day and night.

The building plan contains

• Excavation pit and substructure
• Frame construction of the storage unit
• mineral filling materials
• Integration of the heat pipes
• Connection to ground-source heat pump system and air mixer
• Air duct to the greenhouse

The design is modular and can be implemented using locally available materials .

Technical basic data

Example values ​​for the ELB-1000 model

• Storage area approximately 1.0 m × 1.5 m × 1.5 m
• mineral sand core
• surrounding insulation layer
• Heat pipes in the storage tank
• Connection to ground air system

Typical areas of application

• greenhouses
• cold frames
• small gardens
• Self-sufficient gardens
• Wine cellar
• Hydroponics
• Aquaculture

Typical materials

The construction of the Sí-ELB-1000 uses predominantly simple and locally available building materials:

• Sand (mineral, dry)
• Wooden slats / roof battens for the frame
• Tongue and groove boards
• Construction film
• Nonwoven fabric (geotextile)
• KG or HT pipes for air ducting
• Slider for air volume control
• Stainless steel corrugated pipe for the heat exchanger
• Pipe covers and pipe connections
• Concrete for the cover
• Ceramic insulation for the storage tank
• Vacuum tube collectors (solar thermal)
• screws or nails

Typical material costs: approx. €800 – €2000 , depending on the region and choice of material.

Most materials are available at hardware stores or building material suppliers .

Notice

This is a DIY guide for a pressureless, passive system for temperature stabilization .

This system does not replace a standard-compliant building heating system.