Regelung und Steuerung von thermoaktiven Bauteilsystemen (TABS)

Abstract

Regulation and control of thermally activated building systems (TABS). Thermally activated building systems (TABS) are becom ing increasingly important in terms of energy efficient cooling and heating of buildings. In practice, however, regulation and control of such systems often causes problems. Started five years ago with the aim of getting to grips with these problems, the TABS Control research project was completed in early 2009. The project yielded the following results: various models and simulation programs for TABS; performance-bound calculations for regu lating zones; a range of zone regulation/control strategies for planners to choose from, including good solutions for automatic switching between heating and cooling, for pulsed operation of the zone pump and for room temperature control; the implementation of a subset of these strategies as standard solutions in a Siemens building automation system; laboratory tests on these strategies; a new procedure for the integrated planning of TABS and their regulation/control (referred to as UBB planning procedure -Unknown But Bounded); an Excel planning tool; guidelines on selecting the hydraulic switching topology; a method for operation optimization; the theoretical basis for the new integrated planning procedure and the new regulation/ control strategies; a patent application.

Control of thermally activated building systems (TABS) in intermittent operation with pulse width modulation

“…By treating a quasi-stationary operation (constant switched-on phase Dt 1 and constant switched-off phase Dt 0 , constant # oa , constant # sw ¼ # sw;SpC;PWM and constant _ q g ¼ _ q g;eub ), we obtain a result similar to (12) for the cooling mode: …”

“…In [5,10], a new control concept was presented that is one part of an integrated process consisting of the tasks to design a TABS (planning of HVAC system and of its control [11]), to commission it and to optimize it during operation [12]. In the design phase of a TABS, a base TABS zone control strategy is selected that only reflects the basic control action, e.g.…”

“…In order to define initial parameters of this control part, an unknown-but-bounded design process can be followed [5,11]. Detailed information on this control part and its application can be found in [12].…”

“…(12) and (14) are perfectly valid only for ideal quasi-stationary operation with constant disturbances. Since in these equations, equivalent heat gain bounds are used that are constant for at least 24 h (see [5]), the equations can also be used for non-constant heat gains as can be seen in Section 5.3.…”

Economic Optimal HVAC Design for Hybrid GEOTABS Buildings and CO2 Emissions Analysis

“…[16][17][18]. While this control aspect is beyond the scope of the paper, readers interested in (optimal) control of GEOTABS buildings are referred to [12,[19][20][21][22][23] for rule-based controllers and to [24][25][26][27][28][29][30][31]) for optimal control.…”