Greenhouse climate control
Hello, my aim is to build the greenhouse of size approx. 15x15m^2 with height of 2.5 or 3 m. The problem which I'm struggling to solve is how to manage the temperature in certain range? The greenhouse is for hydroponics system, will try first lettuce then something else on Nutrient Film Technique. Also I want to use green energy sources (solar panels, windmills etc) and with automated control of temperature.
But weather conditions are what make me worry, winter can be -40 C and at summer it can raise up to +40. Also, in summer it can be warm during the day (+30) but at nights it can drop to 18 C or 12 C.
So, how should I design the heating/cooling system? I'm thinking about electrical heating systems in winter, maybe infrared systems, but I'm not confident about it because I can't relate minimal temperature of -40 with the type and amount of heaters. And thats only about heating, there is also cooling part..