title: Hybrid-heating-systems for optimized integration of low-temperature-heat and renewable energy

authors: Schumm, Gregor M.

abstract: The food and beverage industries are significant industrial producers of green-house gas (GHG) emissions. Reductions can be achieved by increased energy efficiency and the use of renewable energy to replace fossil fuel use. The main efficiency method within this industries is the use of low temperature heat (LTH), i.e. below 100 °C. Sources for LTH include heat recovery from process flows, heat rejection from utility operations (i.e. chillers, combined heat and power (CHP), condensing economisers), and renewable energy (i.e. solar thermal). A hybrid heating system (H2S) has been developed that can retrofit steam heater designs for the integration of LTH. Two different systems have been found, for adapting direct and indirect steam heaters, either installing an extra hot water heater or using the indirect hot water loop for the integration. In both systems the existing steam heater remains a part of the system for individual back-up. The set-up and the control algorithm of the H₂S allow installing a 37 % smaller hot water grid than a common design with one central back-up heater. Investigations using a comprehensive model of a whey separation and drying plant showed that implementing a piston engine CHP unit combined with the H₂S reduce the energy costs by 42 % and the GHG emissions by 33 %.

text: Hybrid-heating-systems for optimized integration of low-temperature-heat and renewable energy The food and beverage industries are significant industrial producers of green-house gas (GHG) emissions. Reductions can be achieved by increased energy efficiency and the use of renewable energy to replace fossil fuel use. The main efficiency method within this industries is the use of low temperature heat (LTH), i.e. below 100 °C. Sources for LTH include heat recovery from process flows, heat rejection from utility operations (i.e. chillers, combined heat and power (CHP), condensing economisers), and renewable energy (i.e. solar thermal). A hybrid heating system (H2S) has been developed that can retrofit steam heater designs for the integration of LTH. Two different systems have been found, for adapting direct and indirect steam heaters, either installing an extra hot water heater or using the indirect hot water loop for the integration. In both systems the existing steam heater remains a part of the system for individual back-up. The set-up and the control algorithm of the H₂S allow installing a 37 % smaller hot water grid than a common design with one central back-up heater. Investigations using a comprehensive model of a whey separation and drying plant showed that implementing a piston engine CHP unit combined with the H₂S reduce the energy costs by 42 % and the GHG emissions by 33 %.

year: 2016

title: The role of intuition in social work practice: Differing understandings and attitudes

authors: Curtis, Cate

abstract: There has been a long debate about the use of intuition in helping professions, including social work. Often viewed negatively in professional contexts, intuition is nonetheless used as a form of risk assessment. The current research examined methods of identifying child sexual abuse. A mixed methods approach was taken, with 98 participants completing an online questionnaire and 24 taking part in in-depth interviews. The participants demonstrated varied perceptions of intuition and its usefulness. Although some participants were strongly critical of its use, for others, intuition or ‘gut feelings’ were preferred to formal assessment tools. However, what was discussed as intuition, rather than a form of ‘sixth sense’, was often based on tacit knowledge; for example, abused young people’s observable behaviours combined with known risk factors such as certain family characteristics. Therefore, concerns about the use of intuition may be based on incorrect assumptions.

text: The role of intuition in social work practice: Differing understandings and attitudes There has been a long debate about the use of intuition in helping professions, including social work. Often viewed negatively in professional contexts, intuition is nonetheless used as a form of risk assessment. The current research examined methods of identifying child sexual abuse. A mixed methods approach was taken, with 98 participants completing an online questionnaire and 24 taking part in in-depth interviews. The participants demonstrated varied perceptions of intuition and its usefulness. Although some participants were strongly critical of its use, for others, intuition or ‘gut feelings’ were preferred to formal assessment tools. However, what was discussed as intuition, rather than a form of ‘sixth sense’, was often based on tacit knowledge; for example, abused young people’s observable behaviours combined with known risk factors such as certain family characteristics. Therefore, concerns about the use of intuition may be based on incorrect assumptions.

year: 2024-06-12

title: Final arrangements following death: Maori indigenous decision making and tangi

authors: Nikora, Linda Waimarie

subjects: Maori death rituals

abstract: Death is a universal event. It will happen to all of us, yet how we respond to death is particular and influenced by our cultural worlds. This study offers an investigation of the idiographic, of how one woman responded to, and made arrangements to, mourn and bury her mother. Specifically, we explore how she and her whanau (family) under pressure of time and grief and in the absence of clear final wishes, met to consider issues and make decisions about the situation they were confronted with. This case forms part of a much larger programme of research into Maori death rituals, change and adaption. Informing a scholarly audience unfamiliar with the Maori world requires a significant amount of contextual information. The case study is a powerful strategy to achieve this and one that draws readers into deep understanding (Willig, 2008). This case provides insight into the struggles of an indigenous fourth-world people living within the heterogeneity of Aotearoa/New Zealand society; it demonstrates how values change across generations as people live their lives increasingly away from their ancestral homelands; and how traditionally defined roles and responsibilities within the whanau (family) are challenged by members living away from each other.

text: Final arrangements following death: Maori indigenous decision making and tangi Death is a universal event. It will happen to all of us, yet how we respond to death is particular and influenced by our cultural worlds. This study offers an investigation of the idiographic, of how one woman responded to, and made arrangements to, mourn and bury her mother. Specifically, we explore how she and her whanau (family) under pressure of time and grief and in the absence of clear final wishes, met to consider issues and make decisions about the situation they were confronted with. This case forms part of a much larger programme of research into Maori death rituals, change and adaption. Informing a scholarly audience unfamiliar with the Maori world requires a significant amount of contextual information. The case study is a powerful strategy to achieve this and one that draws readers into deep understanding (Willig, 2008). This case provides insight into the struggles of an indigenous fourth-world people living within the heterogeneity of Aotearoa/New Zealand society; it demonstrates how values change across generations as people live their lives increasingly away from their ancestral homelands; and how traditionally defined roles and responsibilities within the whanau (family) are challenged by members living away from each other.

year: 2012-03