A rooftop air conditioning unit (RTU) is disclosed. The RTU comprises an absorber configured in a supply airstream, and a desorber configured in a regeneration airstream, wherein the desorber is fluidically connected to the absorber via a liquid desiccant system. The RTU further comprises a first heat exchanger configured upstream of the absorber in the supply airstream, a second heat exchanger configured upstream of the desorber in the regeneration airstream, and a third heat exchanger configured downstream of the absorber in the supply airstream, wherein the first heat exchanger and the third heat exchanger are fluidically connected to the second heat exchanger via a vapor compression system.

Integrated adsorption and heat exchanger devices are provided for solid sorption refrigeration systems (1), together with methods for making such devices. An integrated adsorption and heat exchanger device (20, 30, 45, 52) comprises a solid material having formed therein both a porous adsorption structure (21, 31, 44, 53), which is pervious to an adsorbate of said system (1), and a heat exchanger structure (22, 32), which is impervious to said adsorbate, for heat exchange with the porous adsorption structure in operation of the system (1).

A multi-stage adsorber device including a plurality of adsorption stages distributed in sequence, each including an adsorber coupled to an adjacent vapor chamber, wherein the adsorber of each following adsorption stage is thermally coupled to the vapor chamber of a preceding adsorption stage via a heat transfer structure. A heating stage is thermally coupled to a first one of the adsorption stages to selectively provide thermal energy to the adsorbers, while a cooling stage is thermally coupled to a final one of the adsorption stages to selectively cause condensation of desorbed vapor in the vapor chambers. The adsorber device further includes a cooling circuit having first and second cooling sections to selectively cause circulation of a cooling fluid through the cooling stage and through each of the adsorbers, respectively. During a desorption cycle, the heating stage is activated to induce vapor desorption in the adsorbers, resulting in desorbed vapor flowing from each adsorber into the adjacent vapor chamber, and cooling fluid circulates exclusively through the cooling stage via the first cooling section. As a result, desorbed vapor condenses along a surface of the heat transfer structure, during the desorption cycle, releasing latent heat that is transferred to the adsorber of the following adsorption stage. During an adsorption cycle, the heating stage is deactivated to allow vapor adsorption into the adsorbers, and cooling fluid circulates through both the cooling stage and each of the adsorbers via the first and second cooling sections. Uses of such adsorber device are especially contemplated for chilling and/or atmospheric water harvesting applications.

A multi-stage adsorber device including a plurality of adsorption stages distributed in sequence, each including an adsorber coupled to an adjacent vapor chamber, wherein the adsorber of each following adsorption stage is thermally coupled to the vapor chamber of a preceding adsorption stage via a heat transfer structure. A heating stage is thermally coupled to a first one of the adsorption stages to selectively provide thermal energy to the adsorbers, while a cooling stage is thermally coupled to a final one of the adsorption stages to selectively cause condensation of desorbed vapor in the vapor chambers. The adsorber device further includes a cooling circuit having first and second cooling sections to selectively cause circulation of a cooling fluid through the cooling stage and through each of the adsorbers, respectively. During a desorption cycle, the heating stage is activated to induce vapor desorption in the adsorbers, resulting in desorbed vapor flowing from each adsorber into the adjacent vapor chamber, and cooling fluid circulates exclusively through the cooling stage via the first cooling section. As a result, desorbed vapor condenses along a surface of the heat transfer structure, during the desorption cycle, releasing latent heat that is transferred to the adsorber of the following adsorption stage. During an adsorption cycle, the heating stage is deactivated to allow vapor adsorption into the adsorbers, and cooling fluid circulates through both the cooling stage and each of the adsorbers via the first and second cooling sections. Uses of such adsorber device are especially contemplated for chilling and/or atmospheric water harvesting applications.

A system comprises on the one hand a spiral plate exchanger coiled around a principal axis of the exchanger, in particular oriented vertically, so as to delimit a first fluid flow channel having a cross section in the shape of a spiral discharging at a first axial extremity of the exchanger at an inlet zone of which the overall size is contained within a crown, and on the other hand a distribution device configured in order to supply in a homogeneous manner the whole of the surface of the said crown with at least a first fluid, in particular a liquid.

A system comprises on the one hand a spiral plate exchanger coiled around a principal axis of the exchanger, in particular oriented vertically, so as to delimit a first fluid flow channel having a cross section in the shape of a spiral discharging at a first axial extremity of the exchanger at an inlet zone of which the overall size is contained within a crown, and on the other hand a distribution device configured in order to supply in a homogeneous manner the whole of the surface of the said crown with at least a first fluid, in particular a liquid.

A moisture control material including a salt composed of a pyrazolium cation represented by the formula (N1) and a phosphate ester anion. In formula (N1), R.sup.N1, R.sup.N2, R.sup.N3, R.sup.N4 and R.sup.N5 are each independently a hydrogen atom, or an alkyl group having 1 to 12 carbon atoms which optionally has a hydroxy group and optionally includes one or more oxygen atoms in the chain. One or more of R.sup.N1 and R.sup.N2 which are substituents on a nitrogen atom that constitutes a 5-membered ring are alkyl groups having 1 to 12 carbon atoms, which optionally have a hydroxy group and optionally include one or more oxygen atoms in the chain.

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The system comprises a plurality of first fluidic flow channels and a distribution device fed by a flow of a first fluid, notably a liquid, and injecting the flow of first fluid into the plurality of first channels at an output of the distribution device. The output of the distribution device consists of an distribution element for the first fluid, notably formed in a porous material, configured in such a way as to be passed through by the first fluid with a pressure drop such that the first fluid leaves from the distribution element with a uniform surface distribution at an output surface of the distribution element, in a way that ensures a uniform feed of first fluid for the first channels.

The system comprises a plurality of first fluidic flow channels and a distribution device fed by a flow of a first fluid, notably a liquid, and injecting the flow of first fluid into the plurality of first channels at an output of the distribution device. The output of the distribution device consists of an distribution element for the first fluid, notably formed in a porous material, configured in such a way as to be passed through by the first fluid with a pressure drop such that the first fluid leaves from the distribution element with a uniform surface distribution at an output surface of the distribution element, in a way that ensures a uniform feed of first fluid for the first channels.

A subassembly for an adsorption chiller includes an adsorption component that includes a plurality of plates arranged in a stack. Refrigerant passages are defined between refrigerant sides of adjacent pairs of the plates in the stack. An adsorbent material is disposed within the refrigerant passages.