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 CPO-27(Ni) and aluminium fumarate were investigated for adsorption heating, cooling and desalination applications.  Both MOFs have high potential in adsorption applications.  The optimum desorption temperature, for the CPO-27(Ni) is higher than 90 o C and for aluminium fumarate is 55-70 o C.  CPO-27(Ni) outperforms aluminium fumarate at low evaporation temperature (5 o C).  Aluminium fumarate outperforms CPO-27(Ni) at high evaporation temperature (20 o C).

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Metal–organic framework (MOF) materials are new adsorbent materials that have high surface area and pore volume and hence high adsorption uptake. The previous exceptional properties make this class of materials have a great potential in many applications like cooling, gas separation and energy storage. However, there is very limited information on the performance of metal–organic framework materials in energy storage applications and their performance compared to conventional adsorbents. This paper aims to present an experimental characterisation of CPO-27(Ni) MOF material for water adsorption and to investigate its viability for energy storage. CPO-27(Ni) (known as MOF-74(Ni)), which is a MOF material that has high water adsorption capabilities of 0.47 gH2O gads−1 and hydrothermally stable and can be supplied in large quantities. Firstly, the material water adsorption isotherms were predicated using Materials Studio software via the material structure information and then compared to the experimentally measured isotherms. The experimentally measured isotherms and kinetics were used to model a double bed adsorption system for energy storage application using Simulink–Matlab software coupled with Nist RefProp thermophysical routines. Finally, the performance of CPO-27(Ni) was then compared with silica gel. The CPO-27(Ni) was found to outperform silica gel at long half cycle time (more than 30 min) at low evaporating temperature making it suitable for energy storage applications. The energy stored in the condenser and the adsorption bed was found to be dependent mostly on the regeneration and the cooling temperatures. The potential of the energy recovered from the adsorption bed can be double the one recovered from the condenser. Also, the energy recovery during condensation and adsorption was found to be independent of the reactor conductance except at small conductance ratio. Finally, the adsorption unit cooling water flow strategy was found to affect the amount of the energy recovered as recirculating the cooling water through the adsorption bed and then condenser was found to decrease the recovered energy from the condenser by 4%

Many researchers consider adsorption systems as a solution for global problems such as global warming and water scarcity. The experimental and numerical data available in literature are basically focusing on using conventional adsorbent materials such as silica gel and zeolites. Recently, metal-organic framework (MOF) materials has been proposed to substitute these conventional adsorbents. Nevertheless, the potential of MOFs has been only numerically investigated without any experimental data from a real system. To fill this research gap, this work presents for the first time the experimental testing of a MOF material, aluminium fumarate, and how it can affect and enhance the performance of adsorption desalination systems. A parametric study to investigate the effect of different parameters such as chilled water, adsorption cooling water, condensation cooling water, desorption heating water temperatures and half cycle time on the performance of the adsorption system was developed. The suitability of the aluminium fumarate system for adsorption desalination was also assessed through analysing the quality of water produced from the system. Finally, the performance of the aluminium fumarate was also compared to conventional adsorbents such as silica gel. The superior performance of aluminium fumarate highlights the potential of the material in adsorption desalination application.