Patent landscape of not-in-kind active cooling technologies between 1998 and 2017

Renaldi, Renaldi; Miranda, Nicole D.; Khosla, Radhika; McCulloch, Malcolm

doi:10.1016/j.jclepro.2021.126507

Cited by 14 publications

(8 citation statements)

References 67 publications

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“…There are various patent analysis methods, such as patent number analysis (Chen and Lin, 2020), technology classification code analysis (Aaldering et al, 2019a), social network analysis (Aaldering et al, 2019b), and patent map analysis (Renaldi et al, 2021). However, these previous studies often ignore the stochastic process characteristic of technological innovation, which may lead to biased analysis results (Pan et al, 2017;Wei et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Tracing the technological trajectory of coal slurry pipeline transportation technology: An HMM-based topic modeling approach

Wang

Li²,

Feng³

2022

Front. Energy Res.

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Coal slurry pipeline transportation is an important way to realize green coal logistics. However, there are still challenges in understanding the cognitive aspects of coal slurry pipeline transportation technology development trajectory. This study attempts to trace and predict the technology trend from patent texts through the stochastic process analysis of topic evolution. It helps understand the challenges in the development process of coal slurry pipeline transportation technology. And capture trends and development characteristics of the technology to improve research and development (R&D) efficiency and sustainability. As a result, this study extracts potential technology topics from patent text by using the Latent Dirichlet Distribution method. Then, a Word2vec-based topic word vector model is applied to calculate the cosine similarity between topics. And the HMM-based topic evolution trend model is constructed by introducing the Hidden Markov Model (HMM) which can portray a dual stochastic process. Finally, it is used to analyze and predict trends in the technological evolution of this field. It was found that the advancement of technology related to pulping is fundamental to promoting the development of coal slurry pipeline transportation technology, which is also a common research topic. Finally, technologies related to pipeline transportation capacity enhancement and the industrial application of coal slurry will be the focus of future R&D in this field with broad research and application prospects. This study is intended to provide directions for sustainable R&D activities in coal slurry pipeline transportation technology, facilitate interdisciplinary discussions, and provide objective data for future decisions making for scientists and R&D managers in this field.

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Section: Introductionmentioning

confidence: 99%

Tracing the technological trajectory of coal slurry pipeline transportation technology: An HMM-based topic modeling approach

Wang

Li²,

Feng³

2022

Front. Energy Res.

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“…The need for the existing built environment to adapt to impending warmer temperatures requires deploying the best available cooling approaches. A wide portfolio of techniques and technologies is already available to address cooling efficiently (Bhamare et al 2019;Cabeza & Chàfer 2020;Hughes et al 2011;Miranda et al 2021;Renaldi et al 2021;Song et al 2021). These cooling solutions can be classified using five key concepts, aligned with the 'avoid-shift-improve' approach (Creutzig et al 2018): solar protection, heat prevention, heat modulation, heat dissipation and heat removal (Figure 1):…”

Section: Introductionmentioning

confidence: 99%

Overcoming the incumbency and barriers to sustainable cooling

Lizana

Miranda

Gross³

et al. 2022

Buildings and Cities

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This article examines cooling in the built environment, an area of rapidly rising energy demand and greenhouse gas emissions. Specifically, the status quo of cooling is assessed and proposals are made for how to advance towards sustainable cooling through five levers of change: social interactions, technology innovations, business models, governance and infrastructure design. Achieving sustainable cooling requires navigating the opportunities and barriers presented by the incumbent technology that currently dominates the way in which cooling is provided-the vapour-compression refrigerant technology (or airconditioners). Air-conditioners remain the go-to solution for growing cooling demand, with other alternatives often overlooked. This incumbent technology has contributed to five barriers hindering the transition to sustainable cooling: (1) building policies based exclusively on energy efficiency; (2) a focus on temperature rather than other thermal comfort variables; (3) building-centric design of cooling systems instead of occupantcentric design; (4) businesses guided by product-only sales; and (5) lack of innovation beyond the standard operational phase of the incumbent technology. Opportunities and priority actions are identified for policymakers, cooling professionals, technicians and citizens to promote a transition towards sustainable cooling.

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“…Therefore, never as in this historic moment has it been so necessary to find ecocompatible refrigeration techniques that constitute a valid alternative to vapor compression refrigeration systems; so the scientific community has been called upon to research for finding new solutions, using renewable energy sources [17][18][19][20][21] or developing completely new-concept technologies (Not-In-Kind) for cooling and air conditioning [22][23][24]. Among them is the class of solid-state technologies based on caloric effects [25] which is currently considered a promising alternative to vapor compression [26,27] as it is characterized by the use of materials that have not a direct greenhouse effect (GWP = 0) [28].…”

Section: Introduction 1generalitiesmentioning

confidence: 99%

“…Among them is the class of solid-state technologies based on caloric effects [25] which is currently considered a promising alternative to vapor compression [26,27] as it is characterized by the use of materials that have not a direct greenhouse effect (GWP = 0) [28]. It has also 2 of 22 been theoretically estimated that solid-state chillers could have an energy efficiency 50-60% higher than that of vapor compression [29].…”

Section: Introduction 1generalitiesmentioning

confidence: 99%

Numerical Optimization of a Single Bunch of NiTi Wires to Be Placed in an Elastocaloric Experimental Device: Preliminary Results

et al. 2021

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Italy has not yet presented to the scientific community any elastocaloric prototype suitable for refrigeration/air conditioning. The SUSSTAINEBLE project was born from the idea to build a demonstrative elastocaloric prototype for environmental conditioning. The prototype is planned to be rotary and composed by a few bunches of elastocaloric wires crossed by air as heat transfer fluid. Many are the parameters to be investigated before the realization of the device. A numerical practical tool would help to easily optimize the prototype. In this paper a two-dimensional tool of a single bunch of elastocaloric wires based on finite-element method is introduced; it can reproduce step by step the velocity and the pressure field of fluid to predict more accurately the solid-to-fluid heat exchange. The results of a test campaign mostly focused on the optimization of the frequency of the cycle, fluid velocity and the distance between the elastocaloric wires are presented. The results reveal that: (i) 0.12 Hz as frequency; (ii) 7 m s−1 as velocity; (iii) 1.0 mm as optimal wire distance, would better satisfy the trade-off existing in the maximization of temperature span and cooling power per mass unit: 23.7 K and 311.97 W kg−1 are the values achieved, respectively.

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Patent landscape of not-in-kind active cooling technologies between 1998 and 2017

Cited by 14 publications

References 67 publications

Tracing the technological trajectory of coal slurry pipeline transportation technology: An HMM-based topic modeling approach

Tracing the technological trajectory of coal slurry pipeline transportation technology: An HMM-based topic modeling approach

Overcoming the incumbency and barriers to sustainable cooling

Numerical Optimization of a Single Bunch of NiTi Wires to Be Placed in an Elastocaloric Experimental Device: Preliminary Results

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