This high efficiency is the result of a design that creates both a high temperature burn and efficient air mixing and secondary combustion of wood gases (smoke). Rocket stoves burn wood at very high efficiency (generally 93 – 95%, meaning that 93 – 95% of the energy contained in the wood is converted to heat and is thus transferrable to the cooking vessel, and only 5 – 7% is lost as heat or unburned gasses to the surrounding environment) as opposed to traditional wood burning stoves burning larger logs that generally operate at 50% efficiency (and this is under ideal laboratory conditions – if wood is wet and air flow is not managed properly, traditional wood stove systems can operate in the teens for efficiency). Rocket stove technology is an important technology for maximizing the use of the energy contained in wood and making it a feasible replacement for the more modern conventions of gas-fired cooking in forest ecologies. The Hanes Solar Cooker 2.0 and Dutch Oven Wood-Fueled Rocket Cooking Systems While many are familiar with the Coleman-style camp stoves, Partner Steel makes a far more durable, long-lasting, and domestically-made option. Propane/Biogas-Fueled Cooking SystemsĪ portable propane “camp-style” cookstove set on top of a table and configured with a propane tank is recommended for new residential and communal kitchens to provide cooking capabilities within a new spaces very quickly and allow residents and guests to quickly cook with familiar systems when needed. Onsite biogas production can eventually be investigated, and, if found to be feasible, any propane-fueled stoves converted to decrease their negative environmental impact. Even after those more sustainable systems are built, having a propane cookstove as an easily-accessible backup will be helpful when there is the inevitable night of poor preparation as the new systems are being learned and new habits of slower and more intentional movement are developed. Biogas is a gas fuel that can be developed on a home- or local-scale and has the potential to be used in the large selection of turnkey residential appliances (like ranges and ovens) designed to run off of natural gas and propane.Īt rural sites undergoing new development, initially purchasing or utilizing portable “camp-style” cookstoves that can be set on top of a table and configured with a portable propane tank will provide cooking capabilities within a new space very quickly while other, more sustainable systems can be designed for and built. Of those, wood renews the most quickly in the mediterranean- and temperate-climate forest ecologies where we primarily focus our design work, and is typically the best option in terms of sustainability in those areas. Wood, coal, liquid, and gas fuels are the primary concentrated energy sources for residential and small-scale use. CookingĬooking food in a timely manner requires a concentrated energy source. We break the typical residential applications for moving heat into three categories: cooking, space conditioning, and water heating. This work can be done with a wide array of fuels and forces, including burning liquid and gas fuels, wood, or coal by electricity by expansion and compression of gas via friction and using the sun. Moving heat is typically done in two ways: first, releasing and concentrating heat in furnaces, heaters, and stoves so that it can be delivered to living spaces, for household water, or for cooking food, and second, removing heat via cooling equipment such as air conditioners and refrigerators. Before any energy system is designed (ideally as part of a whole site design process), the intrinsic characteristics of a site should be thoroughly compiled and assessed so that the extent of the energy resources available are well understood. They are not one-size fits all techniques – and in fact, what may work well at one site may be a poor fit for another site right next door. The techniques and elements described below are context-specific, meaning they efficiently and sustainably provide for the desired function at the specific site that they were designed for. Examples of various techniques and specific elements are provided to illustrate different ways to move heat. This article delves into the moving heat function that energy serves. There are three jobs that energy typically performs: moving heat, moving things, and moving electricity. In the Introduction to Appropriate Energy, energy is defined as the ability to do work.
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