energy efficiency projects

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1 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 SolarTRANSFER (copyright) Institut for energy efficiency Romanshornerstr. 100 CH-9320 Arbon fon oder mail to

2 ... ich bin an der Zukunft interessier t, weil ich dor t den Rest meines Lebens verbringen we rde... Jede Idee basiert auf einer Vision, und der Anfang wurde 1970 unter dem Eindruck von Planungsgesichtspunkten für autonome Energieversorgungssysteme 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 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 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 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 oder mail to lessing-wenzel@latentspeicher.com

3 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

4 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: kwh energy requirement/day kwh harvest solar power: kwh capacity PT: kwh bypassing with PT: 3 days Energy costs/y: Euro 68% saving total: Euro Invest Solar+LS: Return of invest: life time: energy savings life-time: Euro 5,5 years 25 years Euro Commissioning:

5 project school Schwerte design 1. Data school Space: 3000 m² Pupil: Hot water consumption/d: 3000 l Heat performance Heat requirement/y Heat requirement/d Energy cost now: 260 kw Oil burner kwh 5000 kwh Euro 2. Target of this task: Reduction of energy costs with solar energy and an efficient storage 3. Planning Energy harvest solar kwh Reduction start- and standby losses kwh Savings total kwh = Euro 4. Costs and Return of invest 600 m² solar collector tubes Price/m² 300 Euro Total Euro 30 pcs. PT Big Power boxes Price/box: Euro Total Euro Invest costs: Return of invest: Life-time: Energy savings lifetime: Euro 6,5 years 25 years Euro Unfortunately this project was not realized, because the government of Nordrhein-Westfalen has not clear the capital.

6 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 ,-- Invest costs new CPH machine: ,-- + gas costs computer based loading and unloading processes Commissioning Sommer 2007 Vorlauf Verrohrung nach Tichelmann: 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.)

7 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.

8 Haus der Zukunft Berlin Planning and design competition 1st price: Jan Musikowski, Berlin 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

9 Haus der Zukunft Berlin Planning and design competition Planning a nd design latent storage: Solar TRANSFER Lessing-Wenzel from record of the jury: The energy concept Due to its very efficient building structure, its large roof-mounted PV system and solarthermal 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 absorptiontype 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: 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

10 Project European Parliament in Luxemburg heating and cooling with fuel cells and latent storages Gross floor area: m² The reorganization and rebuilding of the remaining fragmentary 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 cooling

11 Project European Parliament in Luxemburg heating and cooling with fuel cells and latent storages Project data: Gross floor area: m² cooling and heating performance fuel cells: 750 kw requirement storage capacity: kwh Solution: 210 Big Power Boxes (2520 Latent cells) capacity delta T 20: kwh Melting point PCM: 75 C Energy savings: app.3.5 mio kwh/year or Euro Start installation: 2013/2014

12 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 2 nd 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 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 WT 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 2010

13 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 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