Optimal operation of an embedded-piping floor heating system with control input constraints

Zaheeruddin, Mohammed; Zheng, G.R.; Sung-Hwan, Cho

doi:10.1016/s0196-8904(96)00058-1

Cited by 32 publications

(23 citation statements)

References 2 publications

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“…The models available for operation and control studies are too complex (Zaheer-uddin et al, 1994). To this end, a simple model of RFH system useful for control analysis will be developed.…”

Section: Dynamic Model Of a Radiant Floor Heating (Rfh) Systemmentioning

confidence: 99%

“…A simple energy balance of the heat transfer processes in the boiler yields (Zaheer-uddin et al, 1994)…”

Section: Boiler Modelmentioning

confidence: 99%

“…control, while being the simplest, gives rise to large variation in room air and slab surface temperatures (Zaheer-uddin et al, 1994). On the other hand, proportional control with reset requires outdoor air sensor for good control (Zaheer-uddin et al, 1994). This latter strategy adds to the cost and also increases the control complexity.…”

Section: Augmented Control Strategiesmentioning

confidence: 99%

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Augmented control strategies for radiant floor heating systems

Zaheeruddin¹,

Zhang²,

Cho³

2001

Int. J. Energy Res.

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SUMMARYA dynamic model of a radiant #oor heating (RFH) system useful for control analysis is developed. The overall model consists of a boiler, distribution system, an embedded tube #oor slab and building enclosure. The overall model is described by non-linear di!erential equations which were solved using "nite numerical methods. Two control strategies for improving the temperature regulation in RFH systems are proposed. These are: a multistage on}o! control and an augmented constant gain control (ACGC). Simulation results show that the multistage control maintains zone air temperature close to the setpoint better than the existing on}o! control scheme does. Likewise, ACGC gives good zone temperature control compared to the classical proportional control. The ACGC is shown to be robust to changes in weather conditions and internal heat gains. The advantage of the control strategies proposed is that they eliminate the use of outdoor temperature sensors required in some existing control schemes. Being simple and robust, the proposed control schemes are good candidate controls for RFH systems.

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“…The models available for operation and control studies are too complex (Zaheer-uddin et al, 1994). To this end, a simple model of RFH system useful for control analysis will be developed.…”

Section: Dynamic Model Of a Radiant Floor Heating (Rfh) Systemmentioning

confidence: 99%

“…A simple energy balance of the heat transfer processes in the boiler yields (Zaheer-uddin et al, 1994)…”

Section: Boiler Modelmentioning

confidence: 99%

Section: Augmented Control Strategiesmentioning

confidence: 99%

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Augmented control strategies for radiant floor heating systems

Zaheeruddin¹,

Zhang²,

Cho³

2001

Int. J. Energy Res.

Self Cite

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“…refs. [10][11][12][13][14][15][16][17][18][19] and the references therein). In particular, significant attention has been given to the modeling, construction and optimization of core components of central heating system, such as pipe networks and piping elements, radiators and other heating systems, boilers, etc.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, significant attention has been given to the modeling, construction and optimization of core components of central heating system, such as pipe networks and piping elements, radiators and other heating systems, boilers, etc. Furthermore, different control techniques have been applied to such systems in order to regulate temperature in heated areas, including classical and metaheuristic PID controllers [13−15] , fuzzy control schemes [16] , adaptive controllers [19] , optimal controllers [17] , etc.…”

Section: Introductionmentioning

confidence: 99%

Dynamic disturbance rejection controllers for neutral time delay systems with application to a central heating system

Koumboulis¹,

Kouvakas

Paraskevopoulos

2009

Sci. China Ser. F-Inf. Sci.

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In the present paper the problem of disturbance rejection of single input-single output neutral time delay systems with multiple measurable disturbances is solved via dynamic controllers. In particular, the general form of the controller matrices is presented, while the necessary and sufficient conditions for the controller to be realizable are offered. The proposed technique is applied to a test case neutral time delay central heating system. In particular, the nonlinear model of the plant and its linearized approximation are presented. Based on the linearized model, a two-stage controller is designed in order to regulate the room temperature and the boiler effluent temperature. The performance of the closed loop system is investigated through computational experiments.

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Improving the water production of a solar still by adding an internal condensation chamber: A theoretical study

Mahammed

Kerfah

Bezzina

2019

Env Prog and Sustain Energy

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In this article, the validity of a numerical simulation of a basin solar still coupled with a condensation chamber was analyzed, before being cooled through a cooling water system. The system contained a serpentine pipe combined with a rectangular sheet of galvanized steel. The model was validated by comparing calculated and then experimental results mentioned in previous research for a typical day in the month of June 2013, the comparison of results showed a good agreement between the experimental and numerical tests. The model was developed to evaluate the performance of the system with optimum mass flow and compared throughout the typical day of each month of the year with that of a solar still without cooling. The model was investigated numerically according to meteorological data of the Algerian city, Khemis Miliana using the model of Capderou. The equations are modeled by the finite difference method, the Gauss–Seidel iterative method was used to solve the resulting algebraic equation. The highest productivity of the year was 6.7 Kg/m2 during the typical day of august with 60% higher productivity than the still without cooling. It was observed that the productivity of the solar still was sensitive to the flow mass of cooling water. Both the condenser chamber volume and the area from the opening of the evaporator to the condenser chamber have a significant effect on distillate production of the system. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Optimal operation of an embedded-piping floor heating system with control input constraints

Cited by 32 publications

References 2 publications

Augmented control strategies for radiant floor heating systems

Augmented control strategies for radiant floor heating systems

Dynamic disturbance rejection controllers for neutral time delay systems with application to a central heating system

Improving the water production of a solar still by adding an internal condensation chamber: A theoretical study

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