Abstract: A system and method for centrally assuring building air quality are provided. The method includes collecting, from a set of sensors of a plurality of sensors, at least air quality data, wherein the plurality of sensors are installed in different locations within a building; analyzing the collected air quality data to determine an air-quality level across different locations within the building; determining whether an adjustment to at least one control device is required, wherein the determination is based on the determined air-quality level and at least one energy-consumption parameter; and actuating at least one building control device when an adjustment is required, wherein actuating at least one building control device allows for control of air quality across different locations within the building.

Abstract: An optimal energy management method and a system that implements the method for a nearly zero energy building (nZEB) based on the genetic algorithm technique that can provide an optimal balance between the objectives of energy saving, comfort of the building residents and maximum exploitation of the generated electric energy by the renewable energy sources through the proper utilization of a battery storage system, is developed in this invention. The above can be attained by minimizing a cost function that considers the real-time electricity price, the generated/consumed electric energy by each device, the user preferences, the state-of-charge and the energy price of the battery storage system (BSS), and the weather forecast. the system that implements the optimal energy management method comprises energy and temperature sensors, controllable power switches, a battery storage system and a controller with human machine interface.

Abstract: A method for operating a control valve using an HVAC actuator is described, the method comprises a circuit of the HVAC actuator executing the steps of: monitoring (S1) a rotation angle (?) associated with a drive torque (Mdrive) applied by the HVAC actuator for moving the valve member; detecting (S2) a blocking of the control valve, if the applied drive torque (Mdrive) effects a change of the rotation angle (??) which is smaller than a threshold angle (?th); upon detection of the blocking, controlling the HVAC actuator to repeatedly change the applied drive torque (Mdrive) between a first torque value (M1) and a second torque value (M2); and controlling the HVAC actuator to periodically modulate (S4) the first torque value (M1) between a third torque value and a fourth torque.

Abstract: Architectures or techniques are presented that can prioritize operating a consumption device in a manner that is efficient in terms of consumption of a resource over satisfying a specified demand assigned to the consumption device. This re-prioritizing can be performed in response to a price of the resource exceeding a threshold.

Abstract: An air conditioning system is provided, which includes a transfer fan for transferring air to a room as a space in a house from an air-conditioned room, a motion sensor for detecting whether the room is occupied or unoccupied and an air conditioning system controller for controlling the transfer fan. In the air conditioning system, a target air conditioning environment obtaining section obtains at least a target air conditioning environment of the room, an occupied-room air conditioning environment section controls the transfer fan that transfers air to the occupied room to approximate the occupied room to the target air conditioning environment according to information from the motion sensor and an unoccupied-room air conditioning environment section controls the transfer fan that transfers air to the unoccupied room to approximate the unoccupied room to a quasi-target air conditioning environment where an energy burden is lower than that of the occupied room according to information from the motion sensor.

Abstract: An air conditioner is disclosed. The air conditioner comprises a storage, and a processor for identifying a target space on the basis of first gas sensing data, moving the air conditioner to the target space, acquiring information about a gas type on the basis of second gas sensing data sensed within the target space and reference data stored in the storage, and performing an air conditioning operation on the basis of the information about the gas type, wherein the gas sensing data is sensed by a sensor comprising a plurality of sensing modules that react to different gases.

Abstract: An artificial intelligence (AI)-based air conditioner can include a communication unit and a processor. The communication can receive an image including member data from an image acquisition device, where the member data are associated with one or more different members of a member group and are used to distinguish the members from each other. The processor can recognize the member data from the received image, acquire operation data including operation conditions of the air conditioner, which are desired by the members, based on the recognized member data, store member information including the member data and the operation data in a database, analyze the operation conditions of the air conditioner, which are desired by the members, with respect to each member based on the member information corresponding to the member group stored in the database, and autonomously driving the air conditioner for the different members based on the analyzed operation conditions.

Abstract: A method includes monitoring a submerged arc welding (SAW) operation in real-time; determining, based on the monitoring and in real-time, a discrepancy between a desired weld parameter and an actual weld parameter of a weld resulting from the SAW operation; and in response to determining the discrepancy, controlling a power supply, which provides power for the SAW operation, to modify at least one of balance or offset of an alternating current (AC) welding power signal supplied for the SAW operation to compensate for the discrepancy.

Abstract: This document discloses a solution for a method of monitoring an electric power grid. According to an aspect, a method comprises: obtaining, on a basis of one or more physical stimuli generated endogenously in the electric power grid, a first set of measurement data associated with a first location of the electric power grid, the physical stimuli belonging to nominal or near-nominal operation of the electric power grid and generating at least one of voltage fluctuation and current fluctuation that exceeds at least one threshold; computing a grid strength of the first location of the electric power grid on the basis of the first set of measurement data; mapping the grid strength to a grid strength of a second location of the electric power grid on the basis of the first set of measurement data and correlation between electrical characteristics of the first location and the second location.

Abstract: In a commercial building, individual occupant thermal comfort is achieved with optimal cost and energy efficiency through the integration of a variety of local thermal comfort components into a communication network that employs emerging optimization principles to meet individual preferences for the thermal environment on a workstation basis while reducing building energy use and operating in accordance with any constraints on the energy grids that serve the buildings. These multiple objectives are met in part through a robust communication network that employs distributing processing to achieve preferred thermal conditions with optimal control of all components at subzone, zone, system, central plant, and energy grid levels.

Abstract: A system and method of monitoring the performance of an HVAC system including a controller in communication with an HVAC unit where the method includes monitoring environmental conditions using a controller. A target rate of change in indoor air temperature (IATR) can be established, and one or more adjusted environmental values can be adjusted to account for the adjusted IATR measurement. An adjusted IATR value can be established using one or more equations adjusting for a target sensible capacity value of one or more environmental factors in comparison to the measured sensible capacity of the one or more environmental factors to determine the adjusted IATR. The environmental factors can include but are not limited to the indoor air temperature, indoor humidity, outdoor air temperature, and any other measured parameter that could affect system capacity. The system can generate an alert when the adjusted IATR value reaches a pre-determined threshold.

Abstract: The present disclosure is directed to calibrating position detection for a tool. The tool can use a sensor to detect a first value of a parameter. The tool can use a motor to extend the working member of the tool towards a working surface. The tool can include a base. The tool can detect, with the working member in contact with the working service, a second value of the parameter. The tool can determine a z-axis position of the working member relative to the working surface.

Abstract: Disclosed is a method for reducing volume of data transmitted from a field device. The method includes checking a value of a process variable at a first point in time and comparing the value with a value checked at a second point in time preceding the first point in time. The value at the first point in time is transmitted only when it differs from the value at the second point in time by a predetermined first magnitude. Additionally, the value at the first point in time is transmitted only when the difference between the value at the first point in time and the value at the second point in time differ by a predetermined factor from a difference between the value at the second point in time and a value at a third point in time preceding the second point in time.

Abstract: An indoor air purification system installed in a heating, ventilation and cooling (HVAC) system of a residential or commercial building. The air purification system includes an indoor air quality (IAQ) monitor mounted in a return duct of the HVAC system to detect various undesirable gases, as well as climatic conditions, and controls a bi-polar ionization unit to help alleviate undesirable air quality issues that can be considered health risks at excessive levels. The IAQ monitor communicates electronically with the ionization unit and with a building HVAC automation system via wireless and/or wired electronic communication networks. The building HVAC automation system can utilize data from the IAQ monitor to control some HVAC functions to optimize HVAC efficiency.

Abstract: A networked HVAC system is implemented as part of a multi-unit dwelling. At least one HVAC unit is installed within each unit of the multi-unit dwelling. Each individual HVAC unit includes a localized HVAC unit controller, which is connected to an external network. The HVAC unit controller also can be connected to any other controllable HVAC devices in the unit, such as an exhaust fan. The HVAC system addresses the open-loop issue by monitoring temperature, air flow, humidity, air pressure, occupancy, window open/close state, and HVAC units of all units in a multi-unit dwelling, as well as common areas, and optimizing operating parameters to minimize wide swings in operational states and managing the overall system of multiple units/common areas so that energy usage and temperature/ventilation control is optimized. The HVAC system also enables learning and predictive modeling for adapting to real-time and anticipated condition requirements within each zone.

Abstract: A remediation system for threshold leaks in a datacenter liquid cooling system is disclosed. The system includes a fluid controller and a power controller that are adapted to receive input from a learning subsystem that can determine that a threshold leak has occurred even though a computing component is functioning normally, so that a change in power state to reduce reliance on the coolant and so that a change of flow of the coolant may be effected.

Abstract: A computing device system may include a plurality of computing devices and a plurality of racks connected together to form a sled. The plurality of racks may each be connected with a respective set of computing devices of the plurality of computing devices. Each rack of the plurality of racks may include a thermal barrier configured to limit fluid and/or heat transfer. A method of operating computing devices in a facility may include connecting a respective set of computing devices to each of a plurality of racks, connecting the plurality of racks to form a sled, and/or connecting the sled to an opening of a thermal wall separating a first chamber from a second chamber.

Abstract: A system and a method for operating an air handling unit (AHU) at an effective static pressure setpoint in a HVAC system. The method includes receiving airflow setpoint values from each of a plurality of variable air volume (VAV) units to determine a combined airflow set point for the plurality of VAV units of an air handling unit (AHU). The method also includes determining an effective static pressure setpoint for the AHU based on a relation between the combined airflow setpoint value and a static pressure represented by a system effect curve.

Abstract: A control method for air conditioning is proposed. The control method, which is provided to operate an air conditioning apparatus air conditioning an interior space, includes selecting either a comfort priority mode and an energy saving mode as an operational mode, inputting an input air conditioning temperature for air conditioning the interior space, setting a basic air conditioning temperature or a revised air conditioning temperature, by comparing the input air conditioning temperature and the basic air conditioning temperature read out from data in a database, as an air conditioning operational temperature, and operating the air conditioning apparatus so that the interior space is air conditioned at the air conditioning operational temperature.

Abstract: The present invention relates a heating control system through prediction of user's sleep time based on a big data analysis using a smartphone, comprising a user terminal including a plurality of sensors that generate all kinds of sensor data; a big data server that stores all kinds of sensor data; a sleep prediction unit that calculates sleep prediction time of a user based on all kinds of sensor data; and a heating apparatus that determines whether the user currently sleeps or not based on the calculated sleep prediction time and changes an indoor heating control method according to whether the user sleeps or not.