The cost estimate for the diffusion bonded SCO 2 plate heat exchanger manufactured by Heatric is extracted from Moisseytsev & Sienicki (2014) and Pidaparti et al. (2015). These are designed for use as recuperators in high-temperature and high-pressure SCO 2 Rankine cycles. If CO₂ is used with typical tube-side pressure (i.e. < 10 MPa) with low shell-side pressure, shell & tube heat exchangers should be equally suitable to remove heat from CO 2 with process water.