Computers that can recycle energy are among the scenarios IBM Corp. predicts over the next five years as part of its annual “Next Five in Five” year-end innovations report based on technologies being developed in IBM labs and around the world. On-chip water-cooling systems could be used to utilize thermal energy from a cluster of computer processors to provide hot water for an office or house. Computers and data centers could be equipped with similar technology to reuse excessive heat and energy for building heating and cooling needs.