Siemens Industry, Inc.

Siemens Building Technologies, Inc.

Mark A Cascia

Osman Ahmed

James Joseph Coogan

Pankaj Vijay Kalore

Methods for integrated room management in a building management system and corresponding systems and computer-readable mediums. A method includes determining () a solar heat gain coefficient (SHGC) for a room () in a building and determining () predicted open-loop room () temperatures at a plurality of time intervals based on the SHGC and a plurality of electrochromic glass (ECG) () tint levels. The method includes determining () illumination heat and illumination energy for the room () and determining () climate energy for the room (). The method includes determining () a total room energy at each of the time intervals as a function of the ECG () tint levels based on the climate energy, illumination energy, and predicted open-loop room temperatures. The method includes determining () an optimal ECG () tint level that minimizes the total room energy at each of the time intervals and controlling () the ECG () tint levels according to the optimal ECG tint level.

Energy-efficient integrated lighting, daylighting, and HVAC with electrochromic glass

Methods for integrated room management in a building management system and corresponding systems and computer-readable mediums. A method includes determining a solar heat gain coefficient (SHGC) for a room in a building and determining predicted room temperatures for the room at the plurality of time intervals based on the SHGC and a plurality of window blinds tilt angles. The method includes determining illumination heat and illumination energy for the room and determining climate energy for the room. The method includes determining a total room energy as a function of the window blinds tilt angles based on the climate energy, illumination energy, and predicted room temperatures. The method includes determining an optimal blind tilt angle that minimizes the total room energy at each of the time intervals and controlling the tilt angles of window blinds according to the optimal blind tilt angle.

Energy-efficient integrated lighting, daylighting, and HVAC with controlled window blinds

A system and method generates test vectors and a corresponding test program to manipulate terminal units in a building system so pressure and flow measurements correspond to independent modeling equations. The pressure and flow responses of the building system to the test program manipulation may be used to compute loss coefficients for the modeling equations. The modeling equations may then be updated with the computed loss coefficients so a building simulation may be performed. The simulated static pressure response of the modeling equations may be compared to measured static pressures to evaluate the sufficiency of the modeling equations.

System and method for model-based control of a building fluid distribution system

A DDC controller is disclosed which implements a control strategy that provides for near-optimal global set points, so that power consumption and therefore energy costs for operating a heating and/or cooling plant can be minimized. Tile controller can implement two chiller plant component models expressing chiller, chilled water pump, and air handler fan power as a function of chilled water supply/return differential temperature. The models are derived from a mathematical analysis using relations from fluid mechanics and heat transfer under the assumption of a steady-state load condition. The analysis applies to both constant speed and variable speed chillers, chilled water pumps, and air handler fans. Similar models are presented for a heating plant consisting of a hot water boiler, hot water pump, and air handler fan which relates power as a function of the hot water supply/return differential temperature. A relatively simple technique is presented to calculate near-optimal chilled water and hot water set point temperatures whenever a new steady-state load occurs, in order to minimize total power consumption. From the calculated values of near-optimal chilled water and hot water supply temperatures, a near-optimal discharge air temperature from a central air handler can be calculated for each step in load. Although the set points are near-optimal, the technique of calculation is simple enough to implement in a DDC controller.

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Barrington, IL, United States of America

Mark A Cascia