A roof ventilation system operable based on environmental parameters is disclosed. The system includes a vent, a fan, a solar panel, a battery and a controller. The vent is positioned within a field of a roof, and includes a first opening configured to allow airflow between regions above and below the roof. The fan is positioned to generate an air flow through the vent. The solar panel is positioned on the roof in a location such that the solar panel receives solar radiation. The battery is electrically connected to the solar panel. The controller is in communication with the fan, and is configured to drive the fan based on at least one environmental parameter.

Disclosed is a system for conditioning air, the system comprising: a heat exchanger comprising a plurality of heat transfer tubes extending between an accumulation header and an outlet header, an internal volume, and an external surface, wherein an air mover is disposed in fluid communication with an air mover in fluid communication with an air inlet and an air outlet, wherein the air mover is configured to urge a flow of air to be conditioned across the external surface of the heat exchanger, a reactor comprising an adsorbent material, a reactor inlet in fluid communication with the outlet header, and a reactor outlet, a vacuum pump comprising a vacuum pump inlet in fluid communication with the reactor outlet and a vacuum pump outlet in fluid communication with a system exhaust.

Through a power cable from a power collection box, a power conversion device receives DC power. The power conversion device converts the received DC power into AC power and transmits it to a power system. A plurality of air lead-in tubes are laid in parallel. Each of the air lead-in tubes includes a heat exchange part, an opening part, and a lead-in part. The heat exchange part is buried in a ground at a ground surface on a back surface of a solar cell panel. The opening part is exposed to the ground surface. The lead-in part is an opening that communicates with an interior of a building in which the power conversion device is installed. The air lead-in tubes are constructed to draw air in the heat exchange part from the lead-in part by using a sucking mechanism.

Systems and methods are disclosed herein for fluid-dynamic isolation of actively conditioned and return air flow in unconstrained environments. In some embodiments, a system for fluid-dynamic isolation of actively conditioned and return air flow in an unconstrained environment includes: a heat pump subsystem configured to create a conditioned air circuit; and an air curtain subsystem configured to create an air curtain air circuit that isolates the conditioned air circuit from an environment that is external to the system. In this way, conditioned air can be provided in spaces that were impractical before. In addition, this might be done in an efficient way.

A method for controlling a photovoltaic air conditioning system. The method comprises: detecting a grid frequency (101); when the detected grid frequency is not equal to a pre-set frequency, calculating and obtaining a control parameter according to the detected grid frequency (102); and controlling a photovoltaic air conditioning by means of the calculated and obtained control parameter (103). Also disclosed is a photovoltaic air conditioning control device.

A system, an arrangement and method for heating and cooling of several building spaces-or buildings includes two or more building spaces or buildings, and a secondary thermal network including a supply line and a return line. The arrangement further comprises two or more building connections arranged parallel to each other and between the supply line and provided in connection with the two or more building spaces or buildings, a ground hole and a geothermal heat exchanger provided to the ground hole and arranged in connection with the secondary thermal network.

A frequency response optimization system includes a battery configured to store and discharge electric power, a power inverter configured to control an amount of the electric power stored or discharged from the battery at each of a plurality of time steps during a frequency response period, and a frequency response controller. The frequency response controller is configured to receive a regulation signal from an incentive provider, determine statistics of the regulation signal, use the statistics of the regulation signal to generate an optimal frequency response midpoint that achieves a desired change in a state-of-charge (SOC) of the battery while participating in a frequency response program, and use the midpoints to determine optimal battery power setpoints for the power inverter. The power inverter is configured to use the optimal battery power setpoints to control the amount of the electric power stored or discharged from the battery.

Air purification and dehumidification apparatus includes a first cooler that cools air introduced through a first inlet, a first rotor that primarily adsorbs and absorbs VOCs and moisture contained in the air cooled by the first cooler, an air conditioning unit that cools or heats the air primarily purified and dehumidified by the first rotor, a blower that moves the air cooled or heated by the air conditioning unit, a second rotor that adsorbs and absorbs VOCs and moisture remaining in the air moved by the blower, a second cooler that re-cools the air secondarily purified and dehumidified by the second rotor, a first heating unit that heats air that is introduced through a second inlet and is then supplied to the first rotor, using sequentially solar energy and electric energy, and a third cooler that condenses air containing the VOCs and moisture that are released from the first rotor.

The present invention relates to a compact, fully integrated solar powered airconditioning (A/C) device for recycling and cooling the air inside buildings, which device comprises a photovoltaic (PV) solar cell, a Maximum Power Point Tracking (MPPT) Charge Controller, a battery unit and a vapor compression air cooling device.

Cooling units are provided. The cooling units include abase having a housing with control components, a cooling tower attached to the base and having an inner flow path and an exterior surface. An air distribution system is attached to the cooling tower and includes an air distribution chamber defined between first and second enclosures, air dispensers are configured in the first enclosure, and a cover disposed on an exterior surface of the second enclosure. The control components are configured to convey air through the base, the cooling tower, and the air distribution system to dispense air through the cool air dispenser and the warm air dispenser and an electronics package installed on the cooling unit.