A mesh panel for a heat exchanger system is provided. The mesh panel comprises a mesh body extending from an upper end to a lower end, the mesh body having an inlet side and an outlet side opposite the inlet side. The mesh body comprises a plurality of mesh wires arranged to form a mesh pattern defining a plurality of mesh openings between the mesh wires, and at least one penetrating mesh portion extending at least partly along a depth direction of the mesh body, the depth direction being normal to a plane extending between the upper and lower ends of the mesh body, the at least one penetrating mesh portion at least partly defining an air flow opening, the air flow opening having greater dimensions than each of the mesh openings.

Chiller control systems and methods for chiller control use iterative modeling of cooling towers, heat exchangers, and pumps to determine the feasibility of integrated free cooling and the ability to take advantage of free cooling. The control systems and control methods can further include selecting the parameters for operating in the free cooling or integrated free cooling mode to improve efficiency and/or reduce energy consumption when operating in these modes. The models can have inputs and outputs that feed into one another, and converge at a solution over multiple iterations. The feasibility of integrated free cooling can be based on providing cooling to a cooling load process fluid at a heat exchanger. The availability of free cooling can be based on the cooling provided at the heat exchanger achieving a target temperature for the cooling load process fluid.

A method by a controller of a cooling system includes calculating a difference between a first temperature of ambient air and a second temperature of pre-cooled air. The pre-cooled air is ambient air that has been cooled by water from a water distribution system before it enters one or more condenser coils. The method further includes determining that the difference between the first and second temperatures is less than or equal to a predetermined temperature difference, and in response, determining that the first temperature is greater than or equal to a minimum temperature. The method further includes, if the first temperature is greater than or equal to the minimum temperature, instructing the water distribution system to distribute the water to pre-cool the ambient air for a predetermined length of time and to disable the distribution of the water after the predetermined amount of time has elapsed.

A mesh panel for a heat exchanger system is provided. The mesh panel comprises a mesh body extending from an upper end to a lower end, the mesh body having an inlet side and an outlet side opposite the inlet side. The mesh body comprises a plurality of mesh wires arranged to form a mesh pattern defining a plurality of mesh openings between the mesh wires, and at least one penetrating mesh portion extending at least partly along a depth direction of the mesh body, the depth direction being normal to a plane extending between the upper and lower ends of the mesh body, the at least one penetrating mesh portion at least partly defining an air flow opening, the air flow opening having greater dimensions than each of the mesh openings.

Chiller control systems and methods for chiller control use iterative modeling of cooling towers, heat exchangers, and pumps to determine the feasibility of integrated free cooling and the ability to take advantage of free cooling. The control systems and control methods can further include selecting the parameters for operating in the free cooling or integrated free cooling mode to improve efficiency and/or reduce energy consumption when operating in these modes. The models can have inputs and outputs that feed into one another, and converge at a solution over multiple iterations. The feasibility of integrated free cooling can be based on providing cooling to a cooling load process fluid at a heat exchanger. The availability of free cooling can be based on the cooling provided at the heat exchanger achieving a target temperature for the cooling load process fluid.

An air transfer apparatus being an integral or a monolithic structure or enclosure including an integral cavity and other cavities formed from a single piece of material. The integrated cavity includes a plurality of individual dividers forming a plurality of integral segmented cavities where pumps and motors are installed, and a controller which controls the operation of the pump motor such as turns on and off the pump motor and adjusts the speed of the pump motor. The air transfer apparatus is adapted to have at least one heat exchanger pad installed in at least of the sides of the walls and at least one fan installed in the air transfer apparatus.

A multiple mode hybrid heat exchanger apparatus includes a frame assembly, an indirect heat exchange section, a spray system, an intermediate distribution basin, a direct heat exchange section, a vertical passage, a lower air inlet, a cold water collection basin, and a fan. The frame assembly includes a first end wall, a second end wall that opposes the first end wall, a first side wall that extends between the first and second end walls, and a second side wall that opposes the first side wall that extends between the first and second end walls. The direct heat exchange section is disposed below the indirect heat exchange section. The vertical passage is defined by the frame and the direct heat exchange section. The lower air inlet is defined by a plurality of openings n the direct heat exchange section. The lower air inlet is configured to provide an inlet for air into the vertical passage, The cold water collection basin is disposed below the direct heat exchange section. The fan is to induce a flow of air through the lower air inlet. The multiple mode hybrid heat exchanger is selectably configured to operate in an evaporative mode, a dry mode, and an adiabatic mode. The evaporative mode of operation includes activation of the spray system over the indirect heat exchange section, air enters the vertical passage through the direct heat exchange section, and the airflow also passes through the indirect heat exchange section. The dry mode of operation includes deactivation of the spray system, air enters the vertical passage through the direct heat exchange section, and the airflow then passes through the indirect heat exchange section. The adiabatic mode of operation includes the spray system is bypassed on the indirect heat exchange section, the direct heat exchange section is configured to facilitate a passage of water therethrough. The air enters the vertical passage through the direct heat exchange section, the air passing horizontally across a flow of water to directly cool the water. The water is collected in the cold water collection basin. The airflow then passes through the indirect heat exchange section.

A method may include: drawing a slip stream sample from a cooling fluid stream, the cooling fluid stream being fluidically coupled to an outlet of a heat exchanger and an inlet of a cooling tower; introducing the slip stream sample into an expansion chamber; and measuring a concentration of hydrogen gas within a headspace of the expansion chamber.

Embodiments of the present disclosure relate to a condenser assembly for a heating, ventilation, and/or air conditioning (HVAC) system that includes a condenser coil having a plurality of tubes configured to flow a refrigerant therethrough for heat transfer between the refrigerant and a flow of air passing across the plurality of tubes, and a porous material having a plurality of fluid retaining passages, in which the plurality of fluid retaining passages is configured to receive a fluid and enable the flow of air to pass through the porous material and transfer of thermal energy to between the fluid and the flow of air. The porous material is disposed upstream of the condenser coil with respect to the flow of air such that the flow of air passes through the porous material before passing across the plurality of tubes.

In one aspect, a heat exchange apparatus is provided that includes an evaporative heat exchanger assembly including an evaporative heat exchanger and an evaporative liquid distribution assembly configured to distribute evaporative liquid onto the evaporative heat exchanger. The heat exchange apparatus includes a plume abatement assembly downstream of the evaporative heat exchanger. The plume abatement assembly includes at least one heating element configured to increase the temperature of the airflow from the evaporative heat exchanger before the airflow leaves the heat exchange apparatus. The plume abatement assembly has an operative configuration wherein the airflow travels through the at least one heating element to permit the at least one heating element to raise the temperature of the airflow and a bypass configuration wherein less of the airflow travels through the at least one heating element of the plume abatement assembly.