A ventilation device with a through housing that is a duct for an air jet flow having the through housing connected to an opening of a building partition, with a stationary regenerative heat exchanger and a pumping section formed of a centrifugal fan of constant rotation direction and a main reversible air jet driver with an individual drive arranged in series inside the housing, characterized in that the heat exchanger is provided with a metallic pressure vessel with at least one heat exchange system attached to walls of the pressure vessel, wherein an interior of the pressure vessel is filled with a thermodynamic working agent and connected to a cyclic discrete pressure control system of the working agent.

The invention relates to a method and an air condition arrangement for cooling of a user space, comprising the steps of providing an air condition arrangement (1) including a cooling media producing heat exchanger loop (10) having a low pressure tubing (106) in operational connection with a cooling media (31), which cooling media (31) includes water/ice, and having a high pressure tubing (103) in operational connection with a compressor (101) and a condenser (101) and said air condition arrangement further including a air cooling heat exchanger (2) including a cooling media storage member (20) and a flow channel (805, 806, 808) in operational connection with said cooling media (31), to enable inlet flow (801) via at least one inlet (803) of surrounding air into said air condition arrangement (1) to produce a cooled air flow (802) out from said air condition arrangement (1) via at least one outlet (804) during inactivity of said cooling media producing heat exchanger loop (10) and to intermittently produce ice in said cooling media (31) by means of said cooling media producing heat exchanger loop (10), wherein said air condition arrangement (1) provided in a, preferably movable, wall shaped housing (11) and passing inlet air (801) into a downwardly extending path (805) of said flow channel (805, 806, 808).

The cooling systems and methods of the present disclosure involve modular fluid coolers and chillers configured for optimal power and water use based on environmental conditions and client requirements. The fluid coolers include wet media, a first fluid circuit for distributing fluid across wet media, an air to fluid heat exchanger, and an air to refrigerant heat exchanger. The chillers, which are fluidly coupled to the fluid coolers via pipe cages, include a second fluid circuit in fluid communication with the air to fluid heat exchanger and a refrigerant circuit in thermal communication with the second fluid circuit and in fluid communication with the air to refrigerant heat exchanger. Pipe cages are coupled together to allow for expansion of the cooling system when additional cooling capacity is needed. The fluid coolers and chillers are configured to selectively operate in wet or dry free cooling mode, partial free cooling mode, or mechanical cooling mode.

A temperature control unit may include one or more thermoelectric cooling elements coupled to a conditioned space heat exchanger and an unconditioned space heat exchanger. The unit may further include one or more conditioned air fans configured to move air from a conditioned space over the conditioned space heat exchanger. The unit may also include one or more unconditioned air fans configured to move air from an unconditioned space over the unconditioned space heat exchanger. The unit may further include a power supply configured to change a polarity and level of power to the one or more thermoelectric cooling elements.

The invention provides a heat transfer system and a method for operating a heat transfer system in which a heat transfer fluid comprising or consisting of a phase change material (PCM) circulates in a cooling circuit. A combined state of phase value of the heat transfer fluid is determined based on information obtained from a sensor system including a temperature sensor and an electrical resistance sensor realized as two separate sensors or as one combined temperature-and-electrical-resistance sensor. The system and method can securely and effectively prevent a possible blocking of the channels of an indoor heat exchanger of the system by solidified PCM and an unwanted deposition of solid PCM (crystals) on heat transfer surfaces of the indoor heat exchanger.

Embodiments of the present disclosure provide an array of modularized circuits that work individually but collectively to provide a system that can manage an indoor environment. The system is designed in order to match the delivered load more closely to the required load then has been done in the past. The system is also designed in order to enhance and ease of serviceability of the individual circuits when needed.

A multi-stage thermal management system includes a fluid loop configured to supply a chilled heat transfer fluid to a plurality of thermal loads having different cooling demands. The system includes a plurality of heat rejection components arranged in stages and fluidly coupled to the fluid loop. The plurality of heat rejection components is configured to receive a return heat transfer fluid from the plurality of thermal loads and extract heat from the return heat transfer fluid to generate the chilled heat transfer fluid. A control system is configured to selectively draw the chilled heat transfer fluid from each heat rejection component individually and to direct the chilled heat transfer fluid to the plurality of thermal loads based on the different cooling demands of the plurality of thermal loads to meet each of the different cooling demands via supply of the chilled heat transfer fluid.

A heating, ventilation, and air conditioning system in which a primary water loop is used as a heat transfer reservoir for both heating and cooling. A plurality of micro chillers are provided, with each micro chiller being connected to the primary water loop. Each micro chiller includes its own heat engine. Each micro chiller includes one or more fan coil units that exchange heat between the micro chiller and the air in a building. In a first mode a micro chiller transfers heat from the air in the building to the water circulating within the primary water loop. In a second mode the micro chiller transfers heat from the water circulating in the primary water loop to the air in the building. A primary water loop regulation system is provided to control the temperature of the water circulating in the primary water loop.

An indirect evaporative cooling system for cooling a space adjacent to or containing an ablution bay is described. The indirect evaporative cooling system includes a greywater source from the ablution bay and evaporative cooler apparatus located above the space to be cooled in a dome shaped housing. The evaporative cooler apparatus includes a wet channel, at least one spray nozzle, and a dry channel. The at least one spray nozzle is located at the top of the evaporative cooler apparatus and is fluidly connected to the greywater source and the wet channel. The wet channel is located directly above the dry channel. A first side of the dry channel is connected to a first opening with a fan and outside air.

Controlling heating and cooling in a conditioned space utilizes a fluid circulating in a thermally conductive structure in fluid connection with a hydronic-to-air heat exchanger and a ground heat exchanger. Air is moved past the hydronic-to-air heat exchanger, the air having fresh air supply and stale air exhaust. Sensors located throughout the conditioned space send data to a controller. User input to the controller sets the desired set point temperature and humidity. Based upon the set point temperature and humidity and sensor data, the controller sends signals to various devices to manipulate the flow of the fluid and the air in order to achieve the desired set point temperature and humidity in the conditioned space. The temperature of the fluid is kept less than the dew point at the hydronic-to-air heat exchanger and the temperature of the fluid is kept greater than the dew point at the thermally conductive structure.