Exergo-Thermo-Volumes: An Approach for Environmentally Sustainable Thermal Management of Energy Conversion Devices

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Amip J. Shah ◽  
Chandrakant D. Patel
Keyword(s):  
Thermal Management ◽  
Environmental Sustainability ◽  
Heat Removal ◽  
Electronic Cooling ◽  
Environmentally Sustainable ◽  
Energy Technologies ◽  
Removal Capacity ◽  
Efficient Management ◽  
Thermal Solution ◽  
Energy Conversion Devices

The design of cooling solutions is an important consideration for the efficient management of different types of energy technologies. In the present work, we adapt the method of thermo-volumes—which has been used for nearly a decade in the design of electronic cooling solutions—for purposes of expeditiously understanding the thermal resistance of a given solution (in terms of cooling performance) along with its flow resistance (an indicator of the pumping power or energy consumption, which will be required by the thermal solution). Furthermore, we expand on thermo-volumes by including the lifetime exergy cost as a means to enable the consideration of resource consumption (and thus the environmental sustainability) of the cooling solution. We apply this framework for evaluation of thermal management solutions in terms of the heat removal capacity per unit lifetime exergy consumption. This paper concludes by illustrating applicability of the method to the design of a fuel cell thermal management solution.

Designing Environmentally Sustainable Electronic Cooling Systems Using Exergo-Thermo-Volumes

2008 ◽  
Author(s):  
Amip J. Shah ◽  
Chandrakant D. Patel
Keyword(s):  
Environmental Sustainability ◽  
Heat Removal ◽  
Optimal Solution ◽  
Electronics Cooling ◽  
Exergy Loss ◽  
Minimal Amount ◽  
Environmentally Sustainable ◽  
Removal Capacity ◽  
Material Choice ◽  
Exergy Consumption

Thermo-volumes allow the design engineer to expediently understand the thermal resistance of a given cooling solution (an indicator of performance) along with its flow resistance (an indicator of the pumping power, or energy consumption, which will be required by the fluid handler). In the present work, we expand upon thermo-volumes by including the lifetime exergy cost (in units of Joules of availability destroyed) as a means to enable the consideration of resource consumption (and thus the environmental sustainability) of the cooling solution. To achieve these exergo-thermo-volumes, we reinterpret previous definitions of thermo-volumes in terms of the entropy generated during heat transfer and fluid flow. The Guoy-Stodola theorem is used to convert this entropy generation into an ‘operational’ exergy loss. Next, based on the material choice and assembly processes used in creating the product, an embedded exergy consumption that accounts for the amount of exergy destroyed during extraction, transportation and disposal of the material is attached to the operational exergy loss. Thus, the total ‘cradle-to-cradle’ exergy loss of the solution is devised. In this framework, the optimal solution will be that which destroys the minimal amount of exergy. Correspondingly, instead of relying upon the COP (which is focused on operational consumption), we propose evaluation of cooling solutions in terms of the heat removal capacity per unit lifetime exergy consumption. The paper concludes by illustrating applicability of the method to the design of an enterprise server. It should be noted that although the paper is focused on electronics cooling solutions, the methodology is designed to be sufficiently general for use in any thermal management application.

Aircraft Fuel Thermal Management System and Flight Thermal Endurance

2021 ◽  
Author(s):  
Rafiq Manna ◽  
Natarajan Ravikumar ◽  
Stephen Harrison ◽  
Kiari Goni Boulama
Keyword(s):  
Surface Temperature ◽  
Thermal Management ◽  
Management System ◽  
Removal Rate ◽  
Heat Removal ◽  
Fuel Temperature ◽  
Removal Capacity ◽  
Thermal Management System ◽  
Aircraft Fuel ◽  
Over Time

An aircraft thermal management model was created in which fuel is circulated through the heat dissipating components for cooling purposes. A fraction of this fuel is then fed to the engine for combustion, while the excess is cooled by rejecting heat to the ambient and returned to the tank. The thermal management system was designed with the intent of controlling the heat dissipating surface temperature, ensuring a certain heat removal rate, while safeguarding the physical integrity of the fuel. The time variation of the fuel temperature and heat transfer rates was calculated. It was observed that for a constant heat dissipating surface temperature, the heated fuel temperature increased, and the heat removal capacity degraded over time. Conversely, for a specified heat removal rate, both the heat dissipating surface temperature and heated fuel temperature increased during the flight. Lastly, when the maximum fuel temperature was specified, both the heat dissipating surface temperature and heat removal rate decreased over time. In all cases, the time taken for these variables to hit the user-defined threshold values was recorded. A detailed sensitivity analysis was also presented highlighting the critical importance of the fuel recirculation rate on the performance of the thermal management system.

The Existence of Geothermal Energy in Communication Perspective and Sustainable Environment in Indonesia

2019 ◽  
Vol 4 (3) ◽  
pp. 43-52
Author(s):  
Indriyati Kamil ◽  
Oekan S Abdoellah ◽  
Herlina Agustin ◽  
Iriana Bakti
Keyword(s):  
Environmental Sustainability ◽  
Geothermal Energy ◽  
Nature Reserve ◽  
Nature Reserves ◽  
Communication Model ◽  
Conservation Areas ◽  
Conservation Area ◽  
Environmentally Sustainable ◽  
Communication Models ◽  
The Government

This article highlights the dynamics of geothermal energy in the Kamojang nature reserve in Indonesia. A nature reserve is a conservation area that must be protected and preserved, because it has unique flora and fauna, and rare ecosystems whose existence is threatened with extinction. After going through a long study process by an integrated team, the government finally made a policy to change the function of the nature reserve into a Nature Tourism Park. Changes in policy changes to the function of nature reserves cause pros and cons in the community, and cause conflicts between government and environmental activists. The purpose of this study is to identify the factors that cause changes in the function of nature reserves into natural tourism parks in the Kamojang conservation area of Indonesia, as well as to identify appropriate communication models in the management of geothermal energy through communication and environmentally sustainable approaches. Research findings show that the factors that cause changes in the function of nature reserves into tourist parks include; the interests of geothermal energy to meet national energy needs and electricity infrastructure, accommodate the needs of surrounding communities that utilize water resources in conservation areas, and restore ecosystems. The communication model for geothermal energy management that we propose at the same time is also a novelty namely; ecopopulism approach, negotiation approach, collaboration, and equating meaning and orientation to environmental sustainability. Type of Paper: Empirical Keywords: Geothermal Energy, Nature Reserves, Conservation Policies, Communication Models and Sustainable Development.

scholarly journals The Impact of Environmental Sustainability Labels on Willingness-to-Pay for Foods: A Systematic Review and Meta-Analysis of Discrete Choice Experiments

Nutrients ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 2677
Author(s):  
Anastasios Bastounis ◽  
John Buckell ◽  
Jamie Hartmann-Boyce ◽  
Brian Cook ◽  
Sarah King ◽  
...  
Keyword(s):  
Willingness To Pay ◽  
Discrete Choice ◽  
Environmental Sustainability ◽  
Purchasing Power Parity ◽  
Meta Analysis ◽  
Choice Experiments ◽  
Discrete Choice Experiments ◽  
Environmental Damage ◽  
Environmentally Sustainable ◽  
The Impact

Food production is a major contributor to environmental damage. More environmentally sustainable foods could incur higher costs for consumers. In this review, we explore whether consumers are willing to pay (WTP) more for foods with environmental sustainability labels (‘ecolabels’). Six electronic databases were searched for experiments on consumers’ willingness to pay for ecolabelled food. Monetary values were converted to Purchasing Power Parity dollars and adjusted for country-specific inflation. Studies were meta-analysed and effect sizes with confidence intervals were calculated for the whole sample and for pre-specified subgroups defined as meat-dairy, seafood, and fruits-vegetables-nuts. Meta-regressions tested the role of label attributes and demographic characteristics on participants’ WTP. Forty-three discrete choice experiments (DCEs) with 41,777 participants were eligible for inclusion. Thirty-five DCEs (n = 35,725) had usable data for the meta-analysis. Participants were willing to pay a premium of 3.79 PPP$/kg (95%CI 2.7, 4.89, p ≤ 0.001) for ecolabelled foods. WTP was higher for organic labels compared to other labels. Women and people with lower levels of education expressed higher WTP. Ecolabels may increase consumers’ willingness to pay more for environmentally sustainable products and could be part of a strategy to encourage a transition to more sustainable diets.

Environmentally sustainable stochastic procurement model

2018 ◽  
Vol 29 (3) ◽  
pp. 472-498 ◽  
Author(s):  
Harpreet Kaur ◽  
Surya Prakash Singh
Keyword(s):  
Carbon Emissions ◽  
Environmental Sustainability ◽  
Lot Sizing ◽  
Planning Horizon ◽  
Business Environment ◽  
Manufacturing Firms ◽  
Mixed Integer ◽  
Content Type ◽  
Environmentally Sustainable ◽  
Procurement Planning

Purpose Procurement planning has always been a huge and challenging activity for business firms, especially in manufacturing. With government legislations about global concern over carbon emissions, the manufacturing firms are enforced to regulate and reduce the emissions caused throughout the supply chain. It is observed that procurement and logistics activities in manufacturing firms contribute heavily toward carbon emissions. Moreover, highly dynamic and uncertain business environment with uncertainty in parameters such as demand, supplier and carrier capacity adds to the complexity in procurement planning. The paper aims to discuss these issues. Design/methodology/approach This paper is a novel attempt to model environmentally sustainable stochastic procurement (ESSP) problem as a mixed-integer non-linear program. The ESSP optimizes the procurement plan of the firm including lot-sizing, supplier and carrier selection by addressing uncertainty and environmental sustainability. The model applies chance-constrained-based approach to address the uncertain parameters. Findings The proposed ESSP model is solved optimally for 30 data sets to validate the proposed ESSP and is further demonstrated using three illustrations solved optimally in LINGO 10. Originality/value The ESSP model simultaneously minimizes total procurement cost and carbon emissions over the entire planning horizon considering uncertain demand, supplier and carrier capacity.

A Simulation of Small Break Loss of Coolant Accident in Nuclear Heating Reactor Based on RELAP5

2018 ◽  
Author(s):  
Meng Lu ◽  
Heng Xie
Keyword(s):  
Thermal Power ◽  
Heat Removal ◽  
Injection System ◽  
Water Volume ◽  
Nuclear Heating Reactor ◽  
Removal Capacity ◽  
Loss Of Coolant ◽  
Nuclear Heating ◽  
Residual Heat

Nuclear heating reactor is integrated designed without main pump and safety injection system. The loss of coolant accidents are mainly in the form of small break LOCA. As no safety injection system is designed for coolant makeup, the water volume in the reactor vessel is critical since it determines whether the reactor will be submerged during the whole scenario. Therefore, the study on coolant loss in this pool system is indispensable. The RELAP5 code has been developed for best-estimate transient simulation of light water reactor coolant systems during postulated accidents. The long term effect in nuclear heating reactor is important. In this paper we investigated the influential factors on SBLOCA scenario and found the long term residual heat removal capacity is decisive in determining the loss of coolant. The residual heat removal capacity should be greater than 2% of reactor thermal power if ensuring the core submerged in the long run.

scholarly journals Consumer Readiness to Reduce Meat Consumption for the Purpose of Environmental Sustainability: Insights from Norway

2018 ◽  
Vol 10 (9) ◽  
pp. 3058 ◽  
Author(s):  
Marthe Austgulen ◽  
Silje Skuland ◽  
Alexander Schjøll ◽  
Frode Alfnes
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Environmental Impacts ◽  
Food Consumption ◽  
Environmental Sustainability ◽  
Food Choices ◽  
Gas Emissions ◽  
Environmentally Sustainable ◽  
Consumption Practices ◽  
Group Interviews

Food production is associated with various environmental impacts and the production of meat is highlighted as a significant source of greenhouse gas emissions. A transition toward plant-based and low-meat diets has thus been emphasised as an important contribution to reducing climate change. By combining results from a consumer survey, focus group interviews and an in-store field experiment, this article investigates whether Norwegian consumers are ready to make food choices based on what is environmentally sustainable. We ask how consumers perceive the environmental impacts of food consumption, whether they are willing and able to change their food consumption in a more climate-friendly direction, and what influences their perceptions and positions. The results show that there is uncertainty among consumers regarding what constitutes climate- or environmentally friendly food choices and that few consumers are motivated to change their food consumption patterns for climate- or environmental reasons. Consumers’ support to initiatives, such as eating less meat and increasing the prices of meat, are partly determined by the consumers’ existing value orientation and their existing consumption practices. Finally, we find that although providing information about the climate benefits of eating less meat has an effect on vegetable purchases, this does not seem to mobilise consumer action any more than the provision of information about the health benefits of eating less meat does. The article concludes that environmental policies aiming to transfer part of the responsibility for reducing greenhouse gas emissions to food consumers is being challenged by the fact that most consumers are still not ready to make food choices based on what is best for the climate or environment.

scholarly journals Will the EU Taxonomy Regulation Foster Sustainable Corporate Governance?

2021 ◽  
Vol 13 (21) ◽  
pp. 12316
Author(s):  
Alessio M. Pacces
Keyword(s):  
Corporate Governance ◽  
Environmental Sustainability ◽  
Institutional Investors ◽  
Law And Economics ◽  
Securities Regulation ◽  
Environmentally Sustainable ◽  
Financial Products ◽  
Principal Agent Problem ◽  
Sustainability Disclosure ◽  
The Eu

EU securities regulation has established a taxonomy of environmentally sustainable activities. This article discusses, from a law and economics standpoint, the potential of this taxonomy to support sustainable corporate governance. Corporate governance can be an efficient way to channel investor preferences towards sustainability because the concentration of institutional shareholding has lowered the transaction costs of shareholder action. However, there is a principal-agent problem between institutional investors and their beneficiaries, which depends on greenwashing and undermines sustainable corporate governance. This article argues that introducing environmental sustainability into EU mandatory disclosure aligns the institutional investors’ incentives with the interest of their beneficiaries and may foster the efficient inclusion of sustainability in corporate governance. The argument is threefold. Firstly, the EU taxonomy may curb greenwashing by standardizing the disclosure of environmental sustainability. Secondly, this information may become salient for the beneficiaries as the same standards define the sustainability preferences to be considered in recommending and marketing financial products. Thirdly, sustainability disclosure prompts institutional investors to compete for sustainability-minded beneficiaries. Being unable to avoid unsustainable companies altogether, institutional investors are expected to cater to beneficiaries’ preferences for environmental sustainability using voice instead of an exit.

scholarly journals The convergence of environmental sustainability and ocean cruises in two moments: in the academic research and corporate communication

2018 ◽  
Vol 12 (2) ◽  
pp. 152-178 ◽  
Author(s):  
Carlos Eduardo de Almeida Ramoa ◽  
Luiz Carlos da Silva Flores ◽  
Bernd Stecker
Keyword(s):  
Sustainable Development ◽  
Environmental Sustainability ◽  
Sustainable Use ◽  
Academic Research ◽  
Sustainable Practices ◽  
Environmentally Sustainable ◽  
Environmental Initiatives ◽  
Corporate Websites ◽  
Development Goals ◽  
Main Dimension

Concerns for world peace, freedom, and the future of people and the planet have led to several United Nations Conferences, generating discussions on global sustainable development. These efforts resulted in the 2030 Agenda and its 17 Sustainable Development Goals (SDGs). The proposed Goal 14 reflects the concern for the conservation and sustainable use of oceans, seas, and marine resources. In this context, the research objects of this study are ocean cruise ships and the main dimension surveyed is environmental sustainability. Firstly, the study sought to identify through the convergence of the dimensions of sustainability and cruises the contributions to the cruise industry that promote the SDGs. To this end, we carried out a bibliometric analysis of scientific production on cruise ship environment, narrowing the research focus on environmentally sustainable practices. The second research objective is to examine cruise companies’ strategic inclination to provide information on environmental initiatives to the market. The results show little scientific research focused on the convergence of the two topics studied, environmental sustainability and cruises. Only 12 scientific articles were identified. Regarding the information on environmentally sustainable practices, the findings show that only 22.6% of the 31 cruise companies surveyed provide this information on their corporate websites.

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