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Hvac System Design Jobs

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Fixed-Price - Est. Budget: $ 200 Posted
Hi. I have a small server rack cabinet 1000mm H x 800mm D x 600mm W dimensions. This holds 2 servers plus some ancillary equipment. It is sealed with a solid door. Construction of wood / steel. Essentially, very small amount of insulation. This cabinet is in a the corner of a large room inside a building, about 10M x 8M, with an ambient temperature in the room of approximately 22C - 28C (Dry bulb) (Day/night range) Inside the cabinet is a thermal load of approx. 500-700 Watts. This heat load will essentially be constant. The open closing of cabinet will be minimal. Cabinet made of wood, 12MM thick MDF. I need a simple evaporator, condenser, compressor design using a fixed orifice (cap tube) to provide a temperature range of approx. 16 - 22 C inside the cabinet. The temperature is not critical to be held, but the upper limit should not exceed approx 22C Im thinking something like a quiet 'fridge' type hermetic compressor, as this room is used by people. The...

Fixed-Price - Est. Budget: $ 150 Posted
More details can be give upon request. In general we need you to code the software for an arduino device. OBJECTIVES: Must function off raspberry PI, or other arduino device on a full color screen (we can provide most drivers) It will need to turn on and show a spash screen before reaching main screen. Device must read from our Thermocouple module. Must be able to display set temperature read with thermocouple, and raise or cool accordingly to get to a user set temperature. Home main screen will have a menu system, all touch screen activated. We will supply general GUI sketches and provide all graphic design work needed. You must need to know about PID tuning, arduino development, and the concepts of relays, using arduino to trigger one, etc.

Fixed-Price - Est. Budget: $ 50 Posted
I am currently working on a new leak testing device based on pressure difference. I know the setup I want to use and I want to create a model in simulink which I will use as my guide map but I also need a second opinion of someone experieced in underpressure vacuum applications to make sure I have all of the necessary elements in place and that I connect them in a proper way. A succesful engagement will look like this : I am sending you a detailed description and specification for the machine (the machine is very simple btw nothing fancy) In case there are questions I adress them one by one by email. A person interested prepares a simulink model for me with a quick explanation of pitfalls and where he/she thinks it would be better to use "x" and why, along with a list of products that can be used (as a reference) in the setup aka - shopping list. If you are a skilled person in underpressure vacuum applications and you know your way in simulink - it's an easy job for you. Let...

Fixed-Price - Est. Budget: $ 100 Posted
We would like your opinion and advice on refrigeration systems for fresh meat displays and evaluation of some products that we consider to purchase. We would like to 'buy' 5 hours of your time of which 1 for two skype calls and 4 for desk research.