PeaPodTechnologies / PeaPod

PeaPod is a cloud-connected automated plant growth environment, designed as both a distributed phenotype research tool, and a precision agriculture food production.
MIT License
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[FEATURE] - Solution Overview Draft #52

Closed JLefebvre55 closed 2 years ago

JLefebvre55 commented 3 years ago

Assigned to @JLefebvre55, @nchareunsouk, due by July 3rd

NOTE: PR has been linked. Work is to be done on the docs-solutionoverview branch.

Here: /docs/design/solutionoverview

Scope: Detail the purpose, function (inputs/outputs, system vs. surroundings, assumptions), and method (process steps/tree) of the system. If the method is multi-step (aka relies on a multi-part system), recurse (features) and inherit.

JLefebvre55 commented 3 years ago

@nchareunsouk Created draft PR. Work is to be done on docs-solutionoverview

JLefebvre55 commented 3 years ago

@nchareunsouk Might want to combine the nutrient solution ones into a single section, cause we're using a reservoir.

nchareunsouk commented 3 years ago

I found a way to have precise dosing through automation with an inline injection method. Uses off the shelf components.

nchareunsouk commented 3 years ago

Do we need to manage solution temperature?

JLefebvre55 commented 3 years ago

Do we need to manage solution temperature?

Good question @nchareunsouk. I think so, considering that we're also trying to control air temperature, and water has a high thermal capacity.

I'm thinking since we're doing inline nutrient/pH injection AND having a tank, we should consider either a) an inline temp. sensor + water block + peltier PID system (like how pop machines do their cooling) or b) pre-heating/-cooling the reservoir (temp. sensor + water block + peltier PID)

nchareunsouk commented 3 years ago

I'm thinking since we're doing inline nutrient/pH injection AND having a tank, we should consider either a) an inline temp. sensor + water block + peltier PID system (like how pop machines do their cooling) or b) pre-heating/-cooling the reservoir (temp. sensor + water block + peltier PID)

@JLefebvre55. Outdoor misting systems drop the temperature of the air by a significant amount which means they draw heat from the air. So an inline pre-cooler (using peltier) would be ok, that way no control loop would be needed.

Assuming you meant the tank in "pre-heating/-cooling the reservoir", cooling the tank may be challenging due to the insulative properties of the tank however it would help to maintain a more consistent temperature if an inline pre-cooler was installed before it.

nchareunsouk commented 3 years ago

Assuming you meant the tank in "pre-heating/-cooling the reservoir", cooling the tank may be challenging due to the insulative properties of the tank however it would help to maintain a more consistent temperature if an inline pre-cooler was installed before it.

@JLefebvre55. Unless you meant the reservoir where the initial water is stored, in which case there are a few solutions to accomplish that.

JLefebvre55 commented 2 years ago

Took over water temperature section