Energy efficiency projects
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Es geht nicht mehr darum, nur alternative Energien
anzuwenden, es geht darum, die Alternative
zum technologischen Standard werden zu lassen...
Siegfried Lessing-Wenzel
energy
efficiency
projects
Institut for energy efficiency
SolarTRANSFER Romanshornerstr. 100 CH-9320 Arbon
fon 0041-766751255 oder 0041-71-4404563
mail to lessing-wenzel@latentspeicher.com
(copyright)
...ich bin an der Zukunft interessiert,
weil ich dort den Rest meines Lebens verbringen werde...
Jede Idee basiert auf einer Vision, und der Anfang wurde 1970 unter dem
Eindruck von Planungsgesichtspunkten für autonome Energieversorgungs-
systeme für Satelliten, Raumfahrzeuge, sowie militärische Anwendungen
gemacht.
Die Energiekrise 1972/73 sorgte dann für einen kurzfristigen
Forschungsetatpeak für regenerative Energien. Das Battelle Institut in
Frankfurt war in der weltweiten Forschung für regenerative Energien,
Wasserstofferzeugung, Elektrolyse, führend.
Die ersten rechteckigen Solarzellen entwickelte und baute damals
TELEFUNKEN. Die ersten Produktionsanlagen für thermische Kollektoren
entstanden. Die klassischen Heizungsbautechnik – Unternehmen reagierten
gar nicht oder nur sehr verhalten, regenerative Energieerzeugungssysteme
zu entwickeln, in den Markt zu bringen.
Siegfried Lessing entwickelte in dieser historischen Phase an der Uni in
Bremen zusammen mit Wissenschaftlern und Kommilitonen solare
Energiekonzepte. 1984 gründete Siegfried Lessing in Bremen sein Ing. Büro
SolarTransfer, gehörte somit zu den Pionieren der ersten Stunde.
Zusammen mit Dr. Hermann Scheer, der leider zu früh verstorben ist,
gründete er Eurosolar in Bremen.
Die Erfahrungen, die Ergebnisse aus vielen geplanten und gebauten
Photovoltaikanlagen, thermischen Solaranlagen, nicht nur zur
Warmwassererzeugung, sondern schon damals zur Heizungsunterstützung,
führten zu einem umfassenden und führenden Anwendungs – know - how.
1998 entstand das IFACS, das erste solarautarke Forschungs- und
Vertriebszentrum weltweit in Obersulm, es wurde zur Plattform für alle
innovativ- technischen und wirtschaftlichen Aktivitäten von Siegfried Lessing
und Jutta Wenzel. Gemeinsam entwickelten sie Strategien für den
entstehenden Solarmarkt.
Auf dieser gemeinsamen Basis entstand ein schwäbischer Think Tank für
regenerative Energiesystemtechnik, die Grundlagen für solarautarkes Bauen
wurden dort kommerzialisiert und realisiert. Im Raum Heilbronn entstanden
solaraktive Gebäude, deren Heizlast bei ca. 15 Wattstunden/m² lag, auf der
Basis verschiedenen Latentspeicher-Technologien.
Ab 2002 wurde die von Siegfried Lessing entwickelte Latentspeicher
Technology auf der Basis von Paraffinen gefertigt und in die Märkte
eingeführt. Bis heute sind 16.000 Latentspeicherzellen in Europa erfolgreich
im Einsatz.
Heute wird die Technologie im Rahmen einer Nachfolgeregelung in der
Schweiz und in China gefertigt. Solar Transfer und Siegfried Lessing planen,
entwickeln und leisten vielfältigen Support. Lessing ist das Synonym für
Latentspeicher, der aus dem Markt neuer innovativer Produkte für
umweltgerechte, effiziente Energiespeicherung nicht mehr wegzudenken ist.
Spitzenlastpuffer
SolarTRANSFER
Institut for energy efficiency
Romanshornerstr. 100 CH-9320 Arbon
fon 0041-766751255 oder 0041-71-4404563
mail to lessing-wenzel@latentspeicher.com
energy efficiency
IFACS
Institut for applied commercial solar energy
Design and building owner: Siegfried Lessing
Project data:
Gross floor area: 850 m²
Coolingand climatization: geothermal
Solarfront: glass (winter garden)
Thermal insulation: translucent (stairs)
and Eternit curtain wall
Asphalt floor screed
Technical data:
Solar: 56 m² flat collectors
heat performance: 17 kW/peak
Wall heating
4 Energy silos (16 cbm) with latent storage systems
installed in an energy duct in the middle of the building
Capital investment: 1,3 Mio D-Mark
Year of construction: 1997
translucent insulation
east and west
Eternit curtain wall
energy efficiency
Peak load buffer for a horse-wellnessfarm
and a hotel
3,4 MWh latent storage buffer for a 450 kWp
CHP machine (woodchips) and for storage
solar energy from 500 m² solar installation.
Latent storage for stochastic
energy support,and for use as peak load buffer
proof of efficiency:
doubling solar energy benefits
energy requiremen/y: 400.000 kWh
energy requirement/day 1.100 kWh
harvest solar power: 275.000 kWh
capacity PT: 3.400 kWh
bypassing with PT: 3 days
Energy costs/y: 80.000 Euro
68% saving total: 54.400 Euro
Invest Solar+LS: 300.000 Euro
Return of invest: 5,5 years
life time: 25 years
energy savings life-time: 1.360.000 Euro
Commissioning: 26.9.2007
energy efficiency project school Schwerte design 1. Data school Space: 3000 m² Pupil: 1.500 Hot water consumption/d: 3000 l Heat performance 260 kW Oil burner Heat requirement/y 1.000.000 kWh Heat requirement/d 5000 kWh Energy cost now: 75.000 Euro 2. Target of this task: Reduction of energy costs with solar energy and an efficient storage 3. Planning Energy harvest solar. 450.000 kWh Reduction start- and standby losses. 200.000 kWh Savings total 650.000 kWh = 49.000 Euro 4. Costs and Return of invest 600 m² solar collector tubes Price/m² 300 Euro Total 180.000 Euro 30 pcs. PT – Big Power boxes Price/box: 5.000 Euro Total 150.000 Euro Invest costs: 320.000 Euro Return of invest: 6,5 years Life-time: 25 years Energy savings lifetime: 1.225.000 Euro Unfortunately this project was not realized, because the government of Nordrhein-Westfalen has not clear the capital.
energy efficiency
Latent shuttle storage for a pool
Public swimming pool in Brixen/Italy
determination: to buy a further CHP machine
or to find a cost saving solution
Solution:
Installation of a shuttle storage system for stochastic
energy production.
CHP machine (combine heat power) grid behaviour:
machine shall run mooth and uniform
The waste thermal energy of the CHP machine , which
will not be used in the pool,will be storaged in PT for
peak load f.e. in the morning.
The Peak load provided via latent storage system shall
save a further peak-load CHP machine.
Invest costs
156 WZ-1800-BHKW PCM 80°C
Heat quantity: 1,6 Mwh peak
Insulation 150 mm
Invest latent storage: Euro 130.000,--
Invest costs new CPH machine: 115.000,--
+ gas costs
computer based
loading and unloading processes
Commissioning Sommer 2007
Verrohrung nach Tichelmann:
Vorlauf alle Zellen werden gleichmäßig durchströmt.
Durchmesser Verrohrung:
Berechnung durch Ing-Büro
Isolierung:
Außen: 200 mm
Boden: 150 mm
Innen: 100 mm (Empfehlung: jeweils 2 Reihen)
Stabilisierung mit Profilen (z.B. TECE o.ä.)
energy efficiency
hotel project Sandton Grand Hotel Reylof
in Gent with latent storage and cogenerator
Belgian Building Award for Watts ON and SolarTransfer!
Latent Storage DUO TEC
Quantity rooms: 130
Technical data:
Cogenerator DUO TEC 27 kW therm-
15 kW elect
30 PowerTank latent cells BHKW
melting point 50°C
3 hot water storages 1000 l
Backup system:
1 gas condensing boiler 147 kW
now for peak performance and backup
during Service
Target:
The waste thermal energy of the cogenerator
(combine heat power machine) will be used for
hot water supply.
energy efficiency
1st price:
“Haus der Zukunft” Berlin
n M us ik o w s ki, Berlin
Planning and design competition Ja
Techn. data:
Active surface: 6788 m² m²
Energy demand: 60 kWh/m²/a
Heat technology : thermal energy + latent stotage
coolingmachine 380 kW
remote heat
Thermal collectors: 210 m² Vacuum-pipes
Measure of the
Latent storage: h=20 m, diameter=2 m
One or more elements of the latent storage is to be
transparent for the visitors to give them an insight.
from record of the jury:
The special exhibition in the basement and the other
exhibitions on the upper storey are arranged in a
functionally compatible way. However, the flexibility for
alterations appears to be somewhat limited. The
stacked office areas are intelligently inserted.The use
of materials, construction and detailing are well
chosen and insofar as they are apparent, are
appropriate. The room schedule is completely fulfilled;
the costs are below the costs framework; the
characteristic values indicate overall economic
planning. Overall, submission 1013 is a very good,
realisable contribution to solving
energy efficiency e n t storage:
d e s i g n l a t
“Haus der Zukunft” Berlin
Planning and R L e s s in g-Wenzel
Planning and design competition F E
Solar TRANS
from record of the jury:
The energy concept
Due to its very efficient building structure, its
large roof-mounted PV system and solar-
thermal roof system, the building is to be
classified as a plus energy building. The
energy supply concept uses electricity +
district heating and generates the space
cooling via a solar-thermal driven absorption-
type chiller. It is an innovative energy
concept, which aims to achieve a certain
degree of supply autonomy through several
short and long-time accumulators (paraffin
accumulators).
Latent storage energy sylos
consistings of: 36 latent cells
total: 288 latent cells
PCM: 50 - 60°C
One or more elements can be
glazed. Because of the low
load transfer glass elements, it
is recommended that these are
to install on top of the storage.
On top insulating glass and
transparent latent heat cells
Structural steel frame for
total loads
Each storage element with
entry for service
Tichelmann connection
for all storage elements
copyright: Lessing-Wenzel SolarTransfer CH-9320 Arbon
energy efficiency
Project European Parliament in Luxemburg
heating and cooling with fuel cells and latent storages
The reorganization and rebuilding of the remaining fragmentary
Gross floor area: 270.000 m² site created a representative and clear configuration. A six-level
construction and the 18-level high-rise shape the new district
from the outside. The inside features a differentiated structure
with intertwined shapes and free spaces. The "Place du
Parlament" is the introductory element with the Chamber of the
European Parliament.
The many office and conference areas are quickly and
individually accessible by means of the network of hallways. The
office areas are designed for multi-purpose usage and the open
support and technical structures allow the integration of various
workstation concepts.
The facades are double facades - the advantages are noise
protection, sun screen with light channelling as well as the
possibility of natural ventilation. Optimal comfort with low
operating costs are achieved through the thermal activation of
building components and the use of natural resources for heating
and cooling. The concept of the buildings and the building
technology allow a promising and sustainable evolution for the
office workstations.
Sustainability
- controlled natural aeration
- improved heat insulation and solar shading
- use of natural ressources for heat and coolingenergy efficiency
Project European Parliament in Luxemburg
heating and cooling with fuel cells and latent storages
Project data:
Gross floor area: 270.000 m²
cooling and heating
performance fuel cells: 750 kW
requirement storage capacity: 10.600 kWh
Solution:
210 Big Power Boxes (2520 Latent cells)
capacity delta T 20: 10.800 kWh
Melting point PCM: 75°C
Energy savings:
app.3.5 mio kWh/year or 350.000 Euro
Start installation: 2013/2014energy efficiency
Heat support with solar energy for a paddling pool
wirh latent storage Energy Silo
After successful employment of the latent storage
system for the drinking water supply in the
Neckarsulm lido, in a 2nd project solar powering
of the children’s paddling pool was implemented.
Project goal:
Heat supply using the latent storage system
and 40 m² of KBB solar collectors to protect
against nocturnal cooling, swimming pool
exclusively solar-powered, surplus is stored in the
Energy Silo. Thus the swimming pool is kept at
20–25 °C overnight. Projected break-even
according to the city of Neckarsulm: 3 years
Data Energy Silo:
The latent energy storage system Energy Silo
multifunctionally installable/integratable, consisting of:
30 pcs. WZ-1800-1WT
1 pc. concrete hopper, 2500 mm nominal bore
Height: 3500 mm Nominal bore: 2000 mm
Interior insulation PSE 250 mm
Completely installed and piped
ready for connecting and sub-surface
installation
Usable heat quantity: c. 360 kWh
Cooling losses: about 1–2 °C per night
Commissioning: May 2010energy efficiency Customer Report Basis: Traditionally, the children’s pool has not had a heating of its own. After replacing the filter system, the residence time of the basin water could be considerably prolonged without incurring hygiene problems. Because of cooling out (overnight and on suboptimal swimming days), the basin volume of 90 m³ must be drained very frequently and be re-filled with heated water from the clean water pipe of the swimmers’ pool. In the self-contained equipment room of the paddling pool, no fossil fuels are available. Installation of a basin water heater is precluded by spatial restrictions. Solution: The use of a paraffin-based latent heat storage system offers the advantage that solar energy can be saved significantly better than with water-based storage. The cooling of the basin can be compensated with this stored heat energy as required. Payback calculation: Cooling would necessitate emptying the pool 2.8× per week on average. Therefore during one swimming season of 20 weeks some 5,000 m³ of heated water are required. The price of water can be calculated at 5.50 EUR per m³ (including heating and disinfectant). This results in a total of c. 27,700 € per swimming season. If the necessary emptying after load factor according to DIN 19643 for the treatment of swimming pool water, namely 1× per week for a solar-heated pool, is used as a basis, for 20 weeks of bathing there will result operating costs of 8,100 € (taking into account the energy costs from the solar power generation for the heating of 1 m³ of water). Consequently, per swimming season 19,600 € will be saved. Source: City of Neckarsulm, Steffen Plank
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