[EBOOK] The Food and Heat Producing Solar Greenhouse, Yanda and Fisher, Published by John Muir Publications. Inc.

First, a definition is in order because there is some confusion created by the term * solar greenhouse. The confusion is understandable because all greenhouses are, in fact, solar. However, traditionally designed greenhouses have rarely been concerned with the most effective use of the sun’s energy. Those described in this book are. We have incorporated four basic elements in the design and operation of each of our greenhouses:

1. The most efficient collection of solar energy

2. The storage of solar energy.

3 The reduction of heat loss during and following collection periods.

4. Zone layout for the particular light and temperature requirements of various plants.

Attention to these elements produces the following benefits:

I. Surplus thermal energy produced in Winter can be used immediately in an adjoining structure or stored for later use

2 Independence from mechanical healing and cooling devices powered by fossil fuel

3. Fresh food and colorful flowers right through the winter.

This book, the designs and the benefits derived from it. all come from a basic concern with people's relationship to their environment. One basic environmental problem is centered around misuse of energy, g We realized that while many people wish for alternative systems, the success of such systems is dependent on the individual's commitment to the system coupled with an understanding of w hat makes it work And we want you to know exactly what 's involved in building and maintaining your own solar unit.

In the following pages, we’ve shown methods that can be used to make an appreciable addition to the quality of your life through a closer involvement with your food chain (fresher and cheaper vegetables), a free source of partial heating for your house, a more realistic integration with the cycles of the sun. the seasons and the weather, and independence from corporate energy and food games. Whether or not you actually build a greenhouse depends on many factors, space, economics, appropriateness to your location, and determination, to name a few. But even if you don’t build, reading this book will enlarge your understanding of your environment and your relationship with It

This book grew out of the Solar Sustenance Project begun in 1974. It was a modest demonstration project to determine if attached greenhouses could supplement homes in eleven high-elevation locations in the Rockies with fresh food and heat throughout long and cold winters. The work has evolved into an educational process that has worldwide relevance The solar greenhouse IS unique in that it can satisfy two basic human needs, food and slieltei. With other beneficial side effects, such as water conservation and distillation, the potential for greenhouse application is just beginning to be understood.

When we began die project, many engineers and architects insisted that our simple greenhouses wouldn't lengthen the growing season even a week We were told by others that the 90-degree heat produced by the units was virtually useless. Fortunately, we didn’t listen to them Balancing the negativ ism of the cynics, we had the support of many people in the field: Keith Haggard and Peter Van Dresser of Santa Fe. T A. Law and of the Brace Institute in Quebec, Dr. Francis Wcsslingof the University of New Mexico, and several of the people mentioned in Chapter VIII. Now. competent professionals from all over the world arc eagerly exploring the solar greenhouse field, and their expertise will certainly advance the state of the art.

An important aspect of solar greenhouses is dial die principles of design can be applied at any economic level. The $7.00 recycled lumber and polyethylene greenhouse slapped to the south side of a dilapidated dwelling can be just as important and valid a solar application as a $200,000 new solar greenhome under construction in a nearby resort community. We’ve tried to show the whole range of greenhouses in this book and let you make the decision about where you want to jump in

Our work on the project and on this book is founded on two principles: the first is that food production should be a low-energy process. The process is begun by growing as much as you can at home, avoiding anything requiring more units of energy to produce than it contains. Foi that reason, highly controlled, close tolerance food production techniques relying on outside energy sources to maintain them are not stressed here.

The second principle is that greenhouses and other habitable structures should be designed to make maximum use of natural energy flow and to make minimum use of fossil fuels. This means designing a “passive” structure with proper orientation, thermal mass and good insulation. This is not a new idea, hut it is being re-examined today in tile light of present technological capabilities. While a passive structure delivers obvious benefits. It also demands more thought, design work. labor and care in building.

In many ways the passively designed structure is in direct opposition to the current American mode of living It’s not temporary by nature' T"he structure itself has a '‘thermal momentum " that is much like the phvsiological processes of a human body, charging and discharging, inhaling and exhaling. Most importantly, a well designed passive structure doesn’t depend on a constant supply of energy to keep it livable. The building uses the sun as the earth docs, only better.

Since our initial work was done, thousands of passive solar greenhouses have been built. Recent computer simulation studies and advanced technical reports have show n these to be feasible many climate that has heating needs and some winter sunlight to capture and store. We d like to think that the first edition of our book did a great deal to stimulate scientific interest in and examination of the potential of solar greenhouses We know from experience that this book has been widely applied. It is auser’s book; you who buy it will most likely be building a greenhouse or solar application shortly Depending on where you live, you may need to increase the performance of your unit through modifications in design or addition of more sophisticated heat collection and storage systems. For those to whom this applies, we are presented a wide range of such improvements in Chapters IV. V and VIII.

The solar greenhouse field has been blessed with many innovators who are also superb teachers and lecturers. The calm confidence of Doug Balcomb. the lucidity ol Susan Nichols, the aesthetic impeccability of David Wright, the humor and directness of Jack Park, the patient explanations of Doug Taft, and the work of many other talented individuals has done far more to promote solar usage than any government feasibility studies or private advertising campaigns. People like these have contributed immeasurably to the growing use of solar energy.

When you decide to build and operate a solar greenhouse of your own. you will be joining a group of experimenters in what is still an infani science. You do not need to be a scientist to participate. AII the principles involved are elementary and logical. Iheir simplicity makes the benefits derived Irom becoming an active member of the solar community easily accessible to you. Welcome.

[EBOOK] The Food and Heat Producing Solar Greenhouse, Yanda and Fisher, Published by John Muir Publications. Inc.

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