greenhouse sunny building:
the metropolises are far away from nature and the supply chains, so designing a system that can provide the city’s needs for agricultural products locally, would make the cities and metropolises more reliable and sustainable, as the land use is always a challenge so vertical greenhouses are the solution, as the citizens live in the apartments, use water, energy, pay the taxes and rent of the residential buildings, it can be considered that the plants are the citizens of the city, living in the tall buildings, need water, energy, and space but the difference is that they can have profit for the city and one important point is that it can avoid water wastes in this agricultural floors. there are many important features of these buildings:
a. the use of solar energy called BIPVs (building integrated photovoltaic systems) for the energy needs of plants and also the light needs because of the transparency of BIPVs
b. use the controlled water usage with a water circulation system with required treatment.
c. to cut the need for product transportation.
d. eliminate the use of cold storage systems which cause 5% of global warming.
e. vertical greenhouse (hydroponics as an alternative).
f. the green look in the city.
g. sell the products locally.
ducted sharing space (social-duct) :
in very hot or cold climates around the world, people don’t have quality interactions outside, which causes a lot of mental problems, the designed pedestrian-level structure below, is a good place for people to meet up, cycle, or walk. this is a showcase to see how it works and can be modified for different applications. the use of BIPVs here again, would help to supply the energy needs of electrical systems inside. the hot climate can take advantage of the flow acceleration, better wind comfort, and the sunlight besides energy. though, for very hot days, the first door of the duct can be closed and the air conditioners can be used at the beginning of the duct and it automatically would lead the flow forward because of the opening at the end. On frigid days again there is a warm place to hang out another innovation is the use of piezoelectric footstep energy generation. based on human footstep frequency and equivalent energy generation,155 Hz frequency and with a resistive load of 11 kΩ can generate the output power of 25mW for a single plate based on [1]. it almost takes 20 minutes to fully charge a smartphone with these tiles.
the features of these structures are:
a. people’s interaction.
b. avoidance of depression.
c. the use of BIPV for the heating and cooling system inside.
d. based on continuity law (A1V1=A2V2); the ducted form accelerates the flow and cools the transparent colorful PV cells, improving their efficiency.
e. low entrance fee.
f. greenery inside.
g. fighting with extreme climate situations like heat waves and cold flows which we might face more and more in the future.
h. pedestrian wind comfort.
i. The city looks good with colorful structures.
j. Use the footsteps energy generation to charge small devices such as smartphones.
2. the social-duct idea was inspired by ducted wind turbines that accelerate the flow and ensure pedestrian wind and thermal comfort, especially in scorching hot places in the world. it also has the same application in cold climates and the main energy supply is via transparent PV cells that might be hybrid with other sources of renewable energy based on the location. for winters it can be used with doors to be closed.
