This is by far the most creative usage of phase change material in a greenhouse application, I’ve ever seen.
Just a quick bit of history... Construction of the botanical gardens in Berlin began in 1897 with the purpose of exhibiting exotic plants brought back from the German colonies. ”Das Grosse Tropenhaus”, a main feature of the botanical gardens, is currently the largest, self supporting, glass structure in the world.
This gigantic tropical greenhouse maintains a temperature of 30 degrees Celsius with high humidity. Before its recent renovation, it utilized approximately 1,500 tons of coal a year. After recent renovation, energy consumption levels are one-fifth of previous usage. Wallboards, tiles and concrete containing PCM, were considered for energy storage inside the structure.