RACA Journal March 2020 | Page 51

Projects Led by Mac Donald, the team had to ensure that installation of the project was according to regulatory standards, both in terms of system design and fresh produce handling requirements – including those of the Estate. They managed to stay within budget, maintain cold room temperatures as specified and upon completion of installation, and provide training for employees on site. 1 Rederberg Estates sought a reliable and sustainable energy efficient refrigeration system to cool its produce during the post-harvesting process. 2 PROJECT OVERVIEW The new refrigeration system comprises of multiple types of rooms. The three pre-cooling/de-greening rooms designed to cool down 270 bins of mangoes from 30⁰C to 6⁰C in 48 hours and de-green citrus and mangoes. The Steri room is designed to pull down 30 pallets of citrus fruit from 30⁰C to -0.6⁰C in 24 hours and keep it for a further 48 hours in the cold sterilisation protocol,” 3 4 1 and 2: Evaporator Condenser. 3: Multiplex system. 4: Evaporator processing. www.hvacronline.co.za RACA Journal I March 2020 49