Design and experimental evaluation of phase change material based cooling ceiling system

Skovajsa, Jan; Drábek, Pavel; Sehnálek, Stanislav; Zálešák, Martin

doi:10.1016/j.applthermaleng.2021.118011

Cited by 19 publications

(13 citation statements)

References 42 publications

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“…Skovajsa et al [9] investigated radiant ceiling panel with paraffin PCM through experimental measurements, which can be seen in Figure 1 D). The PCM at the bottom of the ceiling panel was under the cooling water pipes.…”

Section: Ceiling Panel With Molecular Encapsulated Pcm Czech Republicmentioning

confidence: 99%

“…The PCM at the bottom of the ceiling panel was under the cooling water pipes. The dimensions of the radiant panel were 1.6 x 0.6 x 0.2 m [9]. The heat flux measured data from the surface of the radiant panel to the room ranged between 10.0 W.m -2 to 29.0 W.m -2 , with an average heat flux value of 25.0 W.m -2 during the passive operation mode.…”

Section: Ceiling Panel With Molecular Encapsulated Pcm Czech Republicmentioning

confidence: 99%

“…The heat flux from the surface of the radiant panel to the room for active cooling operation ranged between 20.0 W.m -2 to 29.0 W.m -2 . The maximum internal heat load was up to 200 W.m -2 [9].…”

Section: Ceiling Panel With Molecular Encapsulated Pcm Czech Republicmentioning

confidence: 99%

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Development of design calculations for radiant ceiling panels incorporating phase change materials (PCMs)

Švarcová,

Shinoda,

Bogatu

et al. 2023

J. Phys.: Conf. Ser.

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Thermally active building systems (TABS) show significant benefits such as providing peak load shifting, peak load reductions, and energy savings. Phase change material (PCM) applications with water circulation have benefits similar to TABS, but PCMs can store more heat per unit volume than concrete due to the latent heat exchange. Radiant panels with PCM can be applied in building retrofit, which gives this application a significant advantage compared to TABS. A design methodology for determining heat flux does not exist though for dimensioning a radiant ceiling system that incorporates PCM. Design methods according to standards for TABS – ISO 11855-2 and for radiant panels – ISO 18566-3 were investigated. Five radiant ceiling panels incorporating PCM were selected from Denmark, Canada, Germany, the Czech Republic and Latvia. The resulting heat flux between the panel and conditioned space, i.e. the room, following methods represented in the standards, were compared with the measured or simulated values reported in the literature. The comparison showed that the calculation for TABS (ISO 11855-2) led to similar results to the measured or simulated values.

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Section: Ceiling Panel With Molecular Encapsulated Pcm Czech Republicmentioning

confidence: 99%

Section: Ceiling Panel With Molecular Encapsulated Pcm Czech Republicmentioning

confidence: 99%

See 1 more Smart Citation

Development of design calculations for radiant ceiling panels incorporating phase change materials (PCMs)

Švarcová,

Shinoda,

Bogatu

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…The experimental evaluation of HVAC systems in the design phase is an important subject [ 17 ] to enhance the system’s efficiency, resource usage [ 18 ], economic effectiveness [ 19 ], thermal comfort [ 20 ], and reduce CO 2 emissions [ 6 , 18 , 19 , 20 , 21 , 22 ]. Extensive research has presented experimental evaluations of energy consumption for HVAC systems.…”

Section: Related Workmentioning

confidence: 99%

“…For example, the construction and maintenance of building stock are responsible for 36% of the CO 2 emission in the European Union (EU) [ 5 ]. In 2018, the building, construction, and building processes represented 36% of energy consumption, 39% of energy-related CO 2 emissions, and 50% of global electricity consumption [ 4 , 6 ]. In critical infrastructure such as airports and hospitals, heating, ventilation, and air-conditioning (HVAC) systems also play a prominent role in emergency scenarios (e.g., fires, biological hazards).…”

Section: Introductionmentioning

confidence: 99%

Fault Injection with Multiple Fault Patterns for Experimental Evaluation of Demand-Controlled Ventilation and Heating Systems

Kiamanesh

Behravan

Obermaisser

2022

Sensors

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Heating, ventilation, and air-conditioning (HVAC) systems are large-scale distributed systems that can be subject to multiple faults affecting the electronics, sensors, and actuators, potentially causing high energy consumption, occupant discomfort, degraded indoor air quality and risk to critical infrastructure. Fault injection (FI) is an effective experimental method for the validation and dependability evaluation of such HVAC systems. Today’s FI frameworks for HVAC systems are still based on a single fault hypothesis and do not provide insights into dependability in the case of multiple faults. Therefore, this paper presents modeling patterns of numerous faults in HVAC systems based on data from field failure rates and maintenance records. The extended FI framework supports the injection of multiple faults with exact control of the timing, locality, and values in fault-injection vectors. A multi-dimensional fault model is defined, including the probability of the occurrence of different sensor and actuator faults. Comprehensive experimental results provide insights into the system’s behavior for concrete example scenarios using patterns of multiple faults. The experimental results serve as a quantitative evaluation of key performance indicators (KPI) such as energy efficiency, air quality, and thermal comfort. For example, combining a CO2 sensor fault with a heater actuator fault increased energy consumption by more than 70%.

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Development and validation of a transient simulation model of a full-scale PCM embedded radiant chilled ceiling

Mousavi

Rismanchi

Brey³

et al. 2023

Build. Simul.

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The recent significant rise in space cooling energy demand due to the massive use of air-conditioning systems has adversely changed buildings’ energy use patterns globally. The updated energy technology perspectives highlight the need for innovative cooling systems to address this growing cooling demand. Phase change material embedded radiant chilled ceiling (PCM-RCC) has lately acquired popularity as they offer more efficient space cooling together with further demand-side flexibility. Recent advancements in PCM-RCC applications have increased the necessity for reliable simulation models to assist professionals in identifying improved designs and operating settings. In this study, a transient simulation model of PCM-RCC has been developed and validated using measured data in a full-scale test cabin equipped with newly developed PCM ceiling panels. This model, developed in the TRNSYS simulation studio, includes Type 399 that uses the Crank-Nicolson algorithm coupled with the enthalpy function to solve transient heat transfer in PCM ceiling panels. The developed model is validated in both free-running and active operation modes, and its quality is then evaluated using several validation metrics. The results obtained in multiple operating scenarios confirm that the model simulates the transient behaviour of the PCM-RCC system with an accuracy within ±10%. Aided by this validated model, which offers the user detailed flexibilities in the system design and its associated operating schemas, PCM-RCC’s potentials regarding peak load shifting, energy savings, and enhanced thermal comfort can be investigated more reliably.

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Design and experimental evaluation of phase change material based cooling ceiling system

Cited by 19 publications

References 42 publications

Development of design calculations for radiant ceiling panels incorporating phase change materials (PCMs)

Development of design calculations for radiant ceiling panels incorporating phase change materials (PCMs)

Fault Injection with Multiple Fault Patterns for Experimental Evaluation of Demand-Controlled Ventilation and Heating Systems

Development and validation of a transient simulation model of a full-scale PCM embedded radiant chilled ceiling

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