Dear members,
Please could advice me regarding a project which I am working on which aims to provide a sustainable cold storage solution for farmers in rural Africa. (see overview here)

Basically we have decided to build a 4.5x4.5x2m cold store (see CAD drawings here), using a solar powered mechanical vapor compression refrigeration system with phase change material thermal storage to store 1550Kg of vegetables at 8-13oC (max ambient temperature 35oC).

Our initial calculations suggest a space heat gain of around 300w (using 200mm polyurethane foam insulated walls and roof and ground insulation using a hollow concrete block layer) and a further 750w required to remove field heat (maximum expected 300Kg of hot produce entering per day), giving an overall estimated nominal cooling load of around 1050w.

We urgently need to know the following:
Are our cooling loads realistic? - (I wanted to access the ASHRAE tables but couldn't find a free source - so we are currently depending on basic hand calcs)
Is there any off the shelf system we could use (or modify slightly) to meet our specifications? (there is a good supplier of LG products in Gambia...)
Thank you.

Kindly,
Qasid