Abstracts Oral Presentations - Solar Food Processing Network

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International Solar Food Processing Conference 2009 Ten years of experience with the mobile solar kitchen and pancake shop Dr. Michael Götz, ExSol – Expertise en cuisine solaire, 15, rue des Gares, CH-1201 Genève, exsol@cuisinesolaire.com, 0041 22 734 734 1 Topic(s) addressed: Examples of solar food projects, grassroots projects 1. Introduction For more than ten years, the mobile solar kitchen / pancake shop (owned by the association GloboSol in Switzerland) has been used every summer in Central Europe to prepare pancakes on ecological fairs and music festivals and to feed youth groups in summer camps. The kitchen is part of our promotional work to spread solar cooking in Europe, but the campaigns have to be auto-financed by the sales and rental fees. This paper resumes what we have done and learned in these years. 2. Summary 2.1 The mobile solar kitchen The “mobile solar kitchen” is a car trailer with an integrated complete kitchen, equipped with two Scheffler cookers, box cookers, a 'hay box', etc. It has been constructed in 1997 after the donation of the trailer by its German manufacturer (Koch). Initially, it was meant to be rented without staff, an idea which proofed to be unrealistic soon. In every summer since more than ten years, it has been used on behalf of the Centre Neuchâtelois de cuisine solaire CNCS (and its successors ExSol and Solemyo), of ULOG Freiburg and on behalf of the owner, the association GloboSol. The way of auto-financing the campaigns (including small remuneration for the team) through rental fees and food sale will be explained in the paper. 2.2 First use: mobile pancake shop Every summer, the mobile kitchen is used as pancake shop ('crêperie solaire') on music festivals and ecological markets and fairs. Music festivals have been chosen as 'target market' in order to reach young people and also 'outsiders' with our message; all too often, ecological events preach to the convinced. Some examples of festivals and average sales numbers will be given and the concrete organisation of our work will be described. 2.3 Second use: mobile kitchen for summer camps In the first years, the kitchen has also served as 'catering service' for parties and ecological events. We prepared dishes like couscous, chilli con carne, soft cheese with potatoes, curry with rice, coffee and tee. Slowly, we moved from single day catering to weekly engagements to provide food for youth groups 3 times a day during summer camps (20 to 40 people). Most bookings are youth camps from Greenpeace's 'Solar Generation' youth campaigns. Examples will be given and the interaction between the rental crew (us), the organisers of the camp (an NGO) and its participants are discussed. 6
International Solar Food Processing Conference 2009 2.4 Technical issues Almost as important as the solar equipment is the way how to handle bad weather and reduced sunlight in the late afternoon. Besides the solar cookers listed earlier, the kitchen is equipped with a unique cooker using wood 'pellets' (chips of compressed sawdust) as a second renewable energy source, and also two standard propane gas stoves. For pancakes, a special Scheffler cooker equipped with a heat storage unit based on a phase change material (metallic tin) can be added to the kitchen. Technical details, our experience with these devices and how to combine the different energy sources will be shown. The mobile solar kitchen selling pancakes on an ecological fair. Greenpeace volonteers preparing food for their group in a youth camp. References: 'The 'solar crêperie' - Promotion of Solar Cooking by Selling Pancakes', Michael Götz, Paper presented at the 'Encuentro Solar 2002' in Benicarlo, Spain in June 2002 'Liquid Tin Heat Storage for Scheffler Parabolic Cookers', Michael Götz, Paper presented at the 'Encuentro Solar 2003' in Benicarlo, Spain in June 2003 7
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Abstracts Oral Presentations - Solar Food Processing Network

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