title: Design of robust total site heat recovery loops via Monte Carlo simulation

authors: Schlosser, Florian

subjects: Science & Technology

abstract: For increased total site heat integration, the optimal sizing and robust operation of a heat recovery loop (HRL) are prerequisites for economic efficiency. However, sizing based on one representative time series, not considering the variability of process streams due to their discontinuous operation, often leads to oversizing. The sensitive evaluation of the performance of an HRL by Monte Carlo (MC) simulation requires sufficient historical data and performance models. Stochastic time series are generated by distribution functions of measured data. With these inputs, one can then model and reliably assess the benefits of installing a new HRL. A key element of the HRL is a stratified heat storage tank. Validation tests of a stratified tank (ST) showed sufficient accuracy with acceptable simulation time for the variable layer height (VLH) multi-node (MN) modelling approach. The results of the MC simulation of the HRL system show only minor yield losses in terms of heat recovery rate (HRR) for smaller tanks. In this way, costs due to oversizing equipment can be reduced by better understanding the energy-capital trade-off.

text: Design of robust total site heat recovery loops via Monte Carlo simulation For increased total site heat integration, the optimal sizing and robust operation of a heat recovery loop (HRL) are prerequisites for economic efficiency. However, sizing based on one representative time series, not considering the variability of process streams due to their discontinuous operation, often leads to oversizing. The sensitive evaluation of the performance of an HRL by Monte Carlo (MC) simulation requires sufficient historical data and performance models. Stochastic time series are generated by distribution functions of measured data. With these inputs, one can then model and reliably assess the benefits of installing a new HRL. A key element of the HRL is a stratified heat storage tank. Validation tests of a stratified tank (ST) showed sufficient accuracy with acceptable simulation time for the variable layer height (VLH) multi-node (MN) modelling approach. The results of the MC simulation of the HRL system show only minor yield losses in terms of heat recovery rate (HRR) for smaller tanks. In this way, costs due to oversizing equipment can be reduced by better understanding the energy-capital trade-off.

year: 2019

title: Critical literacy as an approach to literary study in the multicultural, high-school classroom

authors: Locke, Terry

subjects: critical literacy

abstract: As an approach to literary study, critical literacy is not a widespread practice in New Zealand secondary schools. This article draws on a major project on teaching literature in the multicultural classroom that take place over two years in 2008-2009. In it we report on a case study where a Year 13 English teacher designed and tested a novel English programme with a reputedly less able and culturally diverse group of final-year students entitled “13 English – Popular Culture”. In it, she guided her students through a range of reading tasks aimed at developing in her students an awareness of ways in which texts position readers to take up certain meanings and not others through the language used. Over the course of the programme, students moved from compliant readers to readers who were sensitized to the manipulative power of texts. They enjoyed being exposed to a variety of theme-related texts, especially when these empowered them by enabling them to deploy their own cultural resources in responding to and challenging the texts they encountered. Students needed careful scaffolding in respect of metalinguistic understanding in order to be able to discuss the specific ways in which language constructs meaning. Indeed, these students struggled with this aspect of a critical literacy approach. However, despite the fact that these students were engaged in high-stakes assessment at a higher level than in the previous year, all gained more NCEA credits than they had in Year 12.

text: Critical literacy as an approach to literary study in the multicultural, high-school classroom As an approach to literary study, critical literacy is not a widespread practice in New Zealand secondary schools. This article draws on a major project on teaching literature in the multicultural classroom that take place over two years in 2008-2009. In it we report on a case study where a Year 13 English teacher designed and tested a novel English programme with a reputedly less able and culturally diverse group of final-year students entitled “13 English – Popular Culture”. In it, she guided her students through a range of reading tasks aimed at developing in her students an awareness of ways in which texts position readers to take up certain meanings and not others through the language used. Over the course of the programme, students moved from compliant readers to readers who were sensitized to the manipulative power of texts. They enjoyed being exposed to a variety of theme-related texts, especially when these empowered them by enabling them to deploy their own cultural resources in responding to and challenging the texts they encountered. Students needed careful scaffolding in respect of metalinguistic understanding in order to be able to discuss the specific ways in which language constructs meaning. Indeed, these students struggled with this aspect of a critical literacy approach. However, despite the fact that these students were engaged in high-stakes assessment at a higher level than in the previous year, all gained more NCEA credits than they had in Year 12.

year: 2011

title: The Māori health data governance model: A planning and protocol checklist

authors: Kremer, Lisa

abstract: Māori health data (MHD) governance is a critical enabler of achieving health equity for Māori. The Māori Data Governance Model (the Model) provides a framework for all stages of Māori data handling but has yet to be meaningfully implemented within health settings. This study aimed to meet the need for health-specific guidance by adapting the Model to create an MHD governance checklist. This checklist can be used by health researchers and agencies to develop and embed their own MHD governance protocol (e.g. embed within study protocol).

text: The Māori health data governance model: A planning and protocol checklist Māori health data (MHD) governance is a critical enabler of achieving health equity for Māori. The Māori Data Governance Model (the Model) provides a framework for all stages of Māori data handling but has yet to be meaningfully implemented within health settings. This study aimed to meet the need for health-specific guidance by adapting the Model to create an MHD governance checklist. This checklist can be used by health researchers and agencies to develop and embed their own MHD governance protocol (e.g. embed within study protocol).

year: 2025