The hot water supplied by the heat pump is used for the desorption. In the integrated process, the air is sent to the adsorbent bed at first and after that to the evaporator of the heat pump and then used for the cooling stage. The heat pump provides not only heating but also cooling, while three separate stages (adsorption, cooling, and regeneration) are considered for the DAC. For this reason, an innovative process integrating an ASHP and a DAC adsorption system is proposed here. ![]() This level of temperature is required by several DAC adsorption processes as the thermal energy for the regeneration stage. Variations on their operating conditions could provide water at 100 ☌, when a trans-critical cycle is used. Air source heat pump (ASHP) water heaters are a well-known technology that takes heat from the air to supply hot water. ![]() Here, we consider a way of providing this heat when no local heat source is available. These technologies usually require low-carbon heat as part of their operation cycle. Currently, direct air capture (DAC) appears to be one the "backstop"technologies suitable to provide this service. ![]() Most integrated assessment models indicate a need for technological carbon dioxide removal from the atmosphere to achieve climate mitigation targets.
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