Change point and degree day baseline regression models in industrial facilities

Golden, Allyson Katherine; Woodbury, Keith A.; Carpenter, Joseph; O’Neill, Zheng

doi:10.1016/j.enbuild.2017.03.024

Cited by 18 publications

(9 citation statements)

References 13 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[ 1–4 ] Meanwhile, space heating and cooling occupy huge amounts of building's energy consumption, especially for refrigeration cooling equipment. [ 5 ] Thus, reducing the use of refrigeration equipment is an efficient way to decrease energy consumption. In recent years, passive cooling materials have been widely investigated to suppress the increases in the indoor temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of magnesium hydroxide as a multifunctional additive on high solar reflectance, thermal emissivity, and flame retardancy properties of PP/SEBS/oil composites

Sun

Zhang

2020

Polymer Composites

View full text Add to dashboard Cite

Magnesium hydroxide (Mg(OH) 2) as a traditional environmentally friendly flame-retardant is widely used in polymer matrix to fabricate engineering materials. Cooling performance is important for engineering materials and can be characterized by solar reflectance and emissivity. However, solar reflectance and emissivity of Mg(OH) 2 are rarely reported. In this work, cooling properties of Mg(OH) 2 were investigated and the samples were prepared by blending a series weight ratios of Mg(OH) 2 with polymer elastomer matrix (styrene-ethylene-butylene-styrene copolymer [SEBS], polypropylene [PP], and processing oil). With the introduction of 150 phr Mg(OH) 2 , the solar reflectance enhanced to 47.23%, which is 31.19% higher than the polymer matrix. Simultaneously, the cooling effect of 15 C can be obtained in comparison with the polymer matrix and emissivity enhanced to 0.86. Meanwhile, an introduction of 150 phr Mg (OH) 2 increased the limit oxygen index from 17 to 26 and vertical burning test (UL-94) attained to V-0 rating. Thermal behaviors indicate that the composites exist multiple phase structure, where the glass transition temperature of SEBS is −55 C and melt temperature of PP is 153 C. The results show the composites can be used from −30 C to 80 C and satisfy the outdoor use conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of magnesium hydroxide as a multifunctional additive on high solar reflectance, thermal emissivity, and flame retardancy properties of PP/SEBS/oil composites

Sun

Zhang

2020

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…In existing studies, models with a change point are flexible to describe the varied relationship between the respond and the covariate and have been widely used in degradation modeling, 20–22 pharmacology, 23 and other fields. 24–26 So we believe that the proposed two-stage Arrhenius model will be powerful for extrapolation in the ATDT with a mechanism variation.…”

Section: Model Formationmentioning

confidence: 93%

Bayesian inference for a novel hierarchical accelerated degradation model considering the mechanism variation

Wang

Zhao

2020

Proceedings of the Institution of Mechanical Engineers, Part O:

View full text Add to dashboard Cite

For highly reliable products, accelerated thermal degradation tests are efficient to provide feedback on reliability information. In accelerated thermal degradation tests, the degradation data collected at the elevated temperatures are used to extrapolate the performance of products at the normal temperature. An important tool in such extrapolation is the Arrhenius model, in which the activation energy is generally assumed to be constant. However, in some practical accelerated thermal degradation tests of polymeric materials, a variation of the underlying degradation mechanism is induced when the temperature rises to a certain high level, resulting in a change in the activation energy. Motivated by this phenomenon, we propose a two-stage Arrhenius model. The two stages correspond to the lower and higher temperature ranges with different activation energies. Then, this new model is incorporated to the degradation model, yielding a novel hierarchical model for the accelerated thermal degradation test data from polymeric materials involving a mechanism variation. Furthermore, the Bayesian method is adopted for parameter inference, and the lifetime distribution is obtained subsequently. A practical example of polysiloxane rubbers demonstrates the effectiveness of the proposed model.

show abstract

“…Its calculation is based on the concept of base temperature, from which the building needs to be heated. This variable has been used in numerous studies [38][39][40][41][42].…”

Section: Obtaining and Processing Data On Climatic Variablesmentioning

confidence: 99%

Energy Efficiency Analysis Carried Out by Installing District Heating on a University Campus. A Case Study in Spain

et al. 2018

View full text Add to dashboard Cite

This article analyses the reduction of energy consumption following the installation of district heating (DH) in the Miguel Delibes campus at the University of Valladolid (Spain), in terms of historical consumption and climate variables data. In order to achieve this goal, consumption models are carried out for each building, enabling the comparison of actual data with those foreseen in the model. This paper shows the statistical method used to accept these models, selecting the most influential climate variables data obtained by the models from the consumption baselines in the buildings at the Miguel Delibes campus through to the linear regression equations with a confidence level of 95%. This study shows that the best variables correlated with consumption are the degree-days for 58% of buildings and the average temperature for the remaining 42%. The savings obtained to date with this third generation network have been significantly higher than the 21% average for 33% of the campus buildings. In the case of 17% of the buildings, there was a significant increase in consumption of 20%, and in the case of the remaining 50% of the buildings, no significant differences were found between consumption before and after installation of district heating.

show abstract

Change point and degree day baseline regression models in industrial facilities

Cited by 18 publications

References 13 publications

Effect of magnesium hydroxide as a multifunctional additive on high solar reflectance, thermal emissivity, and flame retardancy properties of PP/SEBS/oil composites

Effect of magnesium hydroxide as a multifunctional additive on high solar reflectance, thermal emissivity, and flame retardancy properties of PP/SEBS/oil composites

Bayesian inference for a novel hierarchical accelerated degradation model considering the mechanism variation

Energy Efficiency Analysis Carried Out by Installing District Heating on a University Campus. A Case Study in Spain

Contact Info

Product

Resources

About