Welcome to Water Wellness Canada. We’re a non-profit organization who’s mission is to build a novel solar humid-air-collector system for combined water treatment, space-cooling and heating.
The proposed system is formed by four main items, forming a closed, solar-thermal-powered air circuit: A greenhouse is connected with vertical or slope arranged solar air collectors (functioning as a solar chimney).
In the chimney, the air passes a humidifier leading to permanent vapour saturation. In a feedback duct, an air-water heat exchanger is installed and connected with a heat accumulator. The air passes from the greenhouse following the buoyancy into the chimney. Being cooled by the heat exchanger, the air falls back to the floor level. Vapour from the greenhouse and from the humidifier condenses, releasing thermal energy and distillation water.
As heat transfer from condensation into the underlying surface is significantly more effective compared to hot air into a smooth surface (depending on air velocity), a heat exchanger can be sized significantly smaller. A less expensive material with adequate conductivity (PE-capillary- tubes) can be used for further cost reduction. Finally, the cooled air rises back into the greenhouse by the lift suction from greenhouse and chimney, thus closing the cycle.
A Solid-State-Fermentation device will be the final element within the essentially closed system. Greenhouse plants and fermentation micro-organisms shal supply each other with oxygen and carbon dioxide. Metabolic (waste-) heat becomes removed by the airflow. Checking the air velocity becomes the central function in fermentation control as in greenhouse climate control. As an alternative to fermentation, CO2 can be fed from a gas-combustion device or by artificially stored CO2. This will be the case during the project to guarantee an initial focus on the energy aspects of the system.
Optimisation for regions with hot and dry climate
The mechanism of energy flow can be reversed for night operation. The daytime heat output is stored and returned at night via the heat exchanger, with the air now moving in the opposite direction. Heat, collected during the day can be used to heat greenhouses and attached buildings during night.
The system can be optimised for water treatment: At night, steam condenses on the cool exterior surfaces of chimney and greenhouse. The heat accumulator stores chilled water to run the cooling function the following day. Desert or neardesert climate conditions with strong day/night fluctuations of temperature favour this type of process.
Grey water from a residential building can be used for irrigation in the greenhouse (the system demands a separation of the faeces in dry vacuum-toilet devices). Water from condensation can be returned to the building for reuse. Additionally, salt or brackish water or polluted surface water can be fed into the system via the air humidifier.
Optimisation for regions with temperate climate
Optimisation for local heat supply requires higher, useable air temperatures due to higher storage efficiency and can be achieved by proportionally increasing the chimney surface in relation to the greenhouse.
The process of energy dissipation can be stretched from a day/night cycle to a seasonal one. Summer heat is used to load a long-term seasonal heat accumulator. During winter, this warmth is used to run a heating system in a building. At the same time, the accumulator stores cold water to provide the cooling function for air circulation during summer.
A heating cascade from the residential building to the greenhouse provides low temperated heat for a greenhouse temperature of 3-15°C and a similar storage temperature for the cooling functions in summer. A further, cheap energy source for greenhouse heating during winter is the composting of organic waste in the fermentation device.
New possibilities for housing can be created, based on the typology of wintergardens. Greenhouses as urban antropospheres with combined functions of food production, water treatment and heat generation can be placed on existing, sealed surfaces like garages, pavements, parking areas etc.
A certain height and dimension of the chimney allows a seperation of greenhouse and chimney. This enables large structures. By arrranging streets and certain garden zones into shaded areas, almost the whole surface of a building area can be used for solar radiation input. A greenhouse is a much more engaging and more eclolgically valuable structure then a sealed surface! Fast Growing Settelments, Marquee Architecture
Fast Growing Settelments, Marquee Architecture
By creating a huge thermal mass at the heat accumulator, the thermal mass of building materials becomes dispensable. A building with tent material can be climatized through the heat accumulator providing cool air at daytime and warm air through out the night. The high cost of the accumulator can be economically over-compensated by saving expenses for the building construction. A tent in combination with a simple solar pond as a cheap heat storage device can be built with not much more then some plastic films and a sufficient amount of salt water.
By using the functions of food production and water recycling, a cheap, fast growing and self-supplying urban structure can be built, potentially even in desert or near-desert environments.
Plant Production Systems
By turning the whole radiation surface to the horizontal level, the chimney can be reduced to a minimum basal surface. Without relevant shadow generating elemets, the circular form can be used as an optimum for air dissipation between chimney and greenhouse. By this setup, huge plant production systems, detached from vertical building structures can be reallized.
We are proud to say that we could not be attempting such project without our generous partners who have been sponsoring our efforts the entire way. We will be updating this section accordingly in the very near future.