Heating gasses in space -- How could we make a greenhouse in space?

In summary, the conversation discusses the possibility of using greenhouses in non-atmospheric environments, such as in space or on other planets. The participants question the effectiveness of greenhouses in trapping heat and discuss potential uses for passively warming a volume in a simple structure. The use of gases and the comparison to Earth's atmosphere are also mentioned.
  • #1

jakehussey

2
0
TL;DR Summary
How could we make a greenhouse in space. Thought experiment!
I was thinking the other day about green houses and how they would act in space or on another planet without an atmosphere. I know that green houses work on Earth by stopping convection but could they theoretically trap heat in a non atmospheric environment? I am imagining a material that allows short wave radiation in and traps long wave from escaping. My assumption is that a gas would have to be used such as CO2 but how could I calculate actual heat generated and how much gas is required?
 
Science news on Phys.org
  • #2
Greenhouses also block some radiation - longer wavelength, and the emitted radiation is longer than the avsorbed. But what's the point of a greenhouse in a vacuum?
 
  • #3
I suppose we are being biocentric. There could be valid reasons for wanting to passively warm a volume that have nothing to do with living critters.
 
  • #4
DaveC426913 said:
I suppose we are being biocentric. There could be valid reasons for wanting to passively warm a volume that have nothing to do with living critters.
Yes Dave. My initial thought was a passively warm volume in a simple structure on another planetary body for keeping equipment warm or heating substances.
 
  • #5
Why use a gas? Why not an actual greenhouse?
 
Reply
  • Like
Likes SammyS and dlgoff
  • #6
Well, I guess the Earth is a sort of greenhouse in the vacuum of space... 🙃
 

1. How can we heat gasses in space for a greenhouse?

The most common method is through the use of solar radiation. This involves building a structure with transparent walls to allow sunlight to enter and heat up the gasses inside. Another option is to use a heating element, such as an electric heater or a nuclear reactor, to generate heat inside the greenhouse.

2. What challenges do we face in creating a greenhouse in space?

One major challenge is the lack of a natural atmosphere in space. This means that we must find a way to contain the gasses inside the greenhouse, as well as provide a source of oxygen for the plants to survive. Additionally, maintaining a stable temperature and humidity level can be difficult in the vacuum of space.

3. Can we use the same materials for a space greenhouse as on Earth?

While some materials, such as glass, can still be used in space, others may not be suitable. For example, plastics can become brittle in extreme temperatures, and metals may oxidize quickly in the absence of oxygen. Scientists are currently exploring new materials and technologies that can withstand the unique conditions of space.

4. How can we regulate the temperature in a space greenhouse?

One option is to use a system of vents or fans to circulate air and regulate the temperature. Another approach is to use insulation materials to trap heat inside the greenhouse. Additionally, the use of shade cloths or reflective coatings on the exterior can help control the amount of sunlight entering the greenhouse.

5. What types of plants can grow in a space greenhouse?

Most plants require a certain level of gravity to grow properly, so scientists are currently experimenting with different plant species to determine which ones can thrive in microgravity. Some early experiments have successfully grown lettuce and other leafy greens in space, and researchers are continuing to explore other options for sustainable food production in space.

Suggested for: Heating gasses in space -- How could we make a greenhouse in space?

A Average temperature in a greenhouse
Replies
2
Views
683
A Energy hypersurface in a phase space (statistical physics)
Replies
1
Views
767
I Statistical ensemble in phase space
Replies
29
Views
590
A Microstates and Phase Space
Replies
7
Views
659
Temperature of a Solar panel in space
Replies
9
Views
1K
B Opening this jar is made easier by cooling or heating?
Replies
8
Views
1K
B Thermodynamics of Resistive Heating at Low Power
Replies
33
Views
1K
Heating a small greenhouse - heat loss
Replies
6
Views
1K
Calculating temp rise caused by electric arc in an enclosed space
Replies
3
Views
797
I Pool Solar Heating - Help orienting the roof-top solar collector please
Replies
1
Views
522

Hot Threads

Recent Insights

Back
Top