A utility patent file revealing the PS5 devkit's cooling system has been published by WIPO. The patent shows the devkit has "a plurality of cooling fans" to help it deal with the heat from the AMD Zen 2 CPU and RDNA 2 GPU. The multiple drawings and explanations prove that Sony was taking care of potential PlayStation 5 heating issues from an early stage.
https://www.notebookcheck.net/PS5-devkit-cooling-system-patent-puts-to-bed-the-final-concerns-that-Sony-hasn-t-taken-care-of-potential-PlayStation-5-heating-issues.468198.0.html
PS4 was laud also whit high electricity consumption.