In a previous post I said that equipment suppliers often supply useful technological information which is not necessarily tied to their equipment.
If you are looking for technical information on heat exchangers for the food industry here is a good place.
This gives you access to an impressive 15 page chapter from the Tetra Pak Dairy Processing Handbook covering uses of heat exchangers, pasteurisation, sterilisation, heat transfer mechanisms, design equations and equipment options.
The complete manual of 440 pages and 600 illustrations costs $80, but there appear to be quite a few free extracts (Tetra Pak has six on its page for the book) online. Some educational institutions provide the manual free of charge for students.
Why not download the chapters that match your activities in food processing. Although these have a focus on dairy there is totally applicable information on heat exchangers, centrifugal separators, membrane separation, homogenizers and rheology.