History: note for greenhouse no.2 in Tibet

After I built the first prototype in 2018, we are planning to build another one. Unfortunately the project is postponed because of the HK protest and Covid-19. The corrent plan is to build it in 2021 spring time.

photos of the site

Current ideas and tasks

1. find the right crops, decide the number of kinds in one greenhouse
2. Decide and calculating the greenhouse size according to the parameters of crops and temperature around the site.
3. Design the heating system, a conversion from the local regular oven
4. Study biogas reactor.
5. Need new structure for the roof frame, the soldered joint area of the first greenhouse breaks after one year. and the price was too high.
6. Earth battery

fertigation pipes, references provided by Nur Akbar Arofatullah

biogas reactor reference

local indoor oven

reference of earth battery

MIT Solar House thermal battery via Wikimedia

Condition of Yushu County
I have send some questions below to the local host Tsansar Kunga and got replied by May 21st 2020:

1. How many students in the school at the moment? how much food we need to grow?: About 30 children, hopefully grow some different vegetables
2. How long does the school open every year?: Excluding the summer vocation and winter vocation, how long should the greenhouse run over a year: 6 month.
3. How long can the greenhouse construction be?: One month and I wish you can teach them basic education about greenhouse
4. When did Tashi Gatsen become the national offical professional school?: 2018 we get certificate