Solar Greenhouse


Visible light from the sun turns into heat when it strikes the dark interior wall of the greenhouse. This heated air tends to rise and concentrate near the top of the greenhouse. It then pushes open the top plastic flap and enters the living quarters. The raised pressure of air in the house causes cold air near the floor to push the bottom flap open into the greenhouse.


The solar greenhouse will continue will continue to bring heat into the house like this until sunlight is blocked by clouds or evening approaches. After a short period of time without sunlight, the convection currents inside the greenhouse reverse. Air cooled by the glazing will tend to drop and the hot air from the living space will rise and try to enter the opening at the top of the greenhouse. Without these one way flaps all the heat gained during the day would soon be lost by this cooling process, but with these flaps daytime heat is trapped inside the house. The flaps turn this ordinary greenhouse into a solar greenhouse.


OK! Now you understand how a solar greenhouse works. Do you think you can build one. The larger you make it the better it works, but the more it will cost. My solar greenhouse is 10 feet high and 20 feet wide. It reaches a temperature of 160 F. in mid winter when the outside temperature of 0 F. You might not want to build one like this large, but you should be able to construct one about 2 feet high as an experimental greenhouse.



site map        comments        about JC
PV Panel Mounting

Trickle Down Solar Heating
MTD Solar Heating

MTD Solar Home 
Solar Heating in December
Solar Heating in January
Sustainable Living Homesteads
Gallery of Solar Homes
Solar Home Basics 
Solar Heated Workshop Plans

Sustainable Solar Heated Workshop

DIY Solar Heating Panels
MTD Solar Collector

Modified Trombe Wall
Solar Hot Air

Hot Air Collector
Solar Heating Collectors

How to Solar Heat
Solar Pumps

DIY Solar Heat Storage
Carry Barrel Solar Hot Water
Multi Tank Heat Storage

Batch Heater

Home Made Solar
DIY Solar Science

Controller introduction
$ 55 Differential Thermostat Kit

$ 65 Differential Controller Kit

$ 85 PV  Differential Controller

$99 Enclosed Differential Controller

$125 Bar Graph Controller

$150 Controller with Monitors

Solar Controller

AC Only Differential Controller

Solar Differential Control
Measuring Sunshine
Sky Eye
DIY Solar Charge Controller

Measuring Temperature
Making Temperature Probes

Solar Collector Flow Dynamics

Flat Plate Collector

Sun 4 Earth

Oil Alternative Articles

Collector Efficiency

Energy Alternatives 

Green Collar Work

Photovoltaic Discoveries

Brick Test

Jug Test

Evacuated Tube Introduction

Evacuated Tube Steam

Modular Heat Storage

What is Energy ?

Our Big Sun

Origin of Time

Oil Alternative for a Solar Age

Green Solar Recycling

Green Machine
Green Train

A Green Energy Workshop

Specific Heat