title: Evaluation of a stratified tank based heat recovery loop via dynamic simulation

authors: Schlosser, Florian

abstract: Prerequisite for hot water recovery in the dairy and beverage industry is the use of heat storage, such as stratified tanks. Total Site Heat Integration enables the targeting of heat recovery potential, the concrete identification of suitable sinks and source profiles and the dimensioning of intermediate circuits and storages. For a cost and energy efficient storage, the aim to maintain stratification by suitable thermocline control management. Dynamic simulation enables a reliable estimation of energy savings and correct storage/control design considering the changing operation times, source and sink loads as well as thermal inertias. This poses two challenges: model accuracy and acceptable simulation time. A stratified tank model with Variable Layer Height (VLH) is evolved reducing numeric diffusion effects. A sensitive analysis shows the increased accuracy with acceptable simulation time. As part of a case study, thermocline growth due to numeric diffusion is reduced up to approximately 35 % by a VLH model. The model is simulated for a case study in the dairy industry. It is shown that up to 94 % of the total heat recovery target can be achieved by the modelled heat recovery loop based on a stratified tank and the applied system control.

text: Evaluation of a stratified tank based heat recovery loop via dynamic simulation Prerequisite for hot water recovery in the dairy and beverage industry is the use of heat storage, such as stratified tanks. Total Site Heat Integration enables the targeting of heat recovery potential, the concrete identification of suitable sinks and source profiles and the dimensioning of intermediate circuits and storages. For a cost and energy efficient storage, the aim to maintain stratification by suitable thermocline control management. Dynamic simulation enables a reliable estimation of energy savings and correct storage/control design considering the changing operation times, source and sink loads as well as thermal inertias. This poses two challenges: model accuracy and acceptable simulation time. A stratified tank model with Variable Layer Height (VLH) is evolved reducing numeric diffusion effects. A sensitive analysis shows the increased accuracy with acceptable simulation time. As part of a case study, thermocline growth due to numeric diffusion is reduced up to approximately 35 % by a VLH model. The model is simulated for a case study in the dairy industry. It is shown that up to 94 % of the total heat recovery target can be achieved by the modelled heat recovery loop based on a stratified tank and the applied system control.

year: 2018

title: Evaluating riverine flood policy: Land use planning trends in Aotearoa New Zealand

authors: Hanna, Christina Jane

abstract: Globally, the responsibility to develop flood risk policy is often devolved to local government. However, local governments can lack the capacity to keep up with increasing and changing flood risk and information provision without external guidance and support. Central and state governments can deliver policy support and consistency by providing policy direction or standards based on best practice. Due to diverse localised modelling, plans and policies, there is often limited understanding of the nature of flood policy, the degree of variation between localities, and how authorities are improving practice and responding to increasing and changing risk. In this study, we develop and apply an evaluation tool for riverine flood planning that captures the modelling parameters, policies, and information used by regional authorities, distinguishing between traditional and emerging approaches. We examine three primary categories of regional flood policy: modelling parameters and associated planning regulations, risk-based policy approaches, and information provision processes. Our findings reveal evolving practices, policy variances, and aspects of contention, demonstrating where central and state governments can provide greater direction for policy development. Our evaluation tool therefore provides a basis to guide complex policy transitions, from static hazard-based planning towards a more comprehensive, risk-based approach.

text: Evaluating riverine flood policy: Land use planning trends in Aotearoa New Zealand Globally, the responsibility to develop flood risk policy is often devolved to local government. However, local governments can lack the capacity to keep up with increasing and changing flood risk and information provision without external guidance and support. Central and state governments can deliver policy support and consistency by providing policy direction or standards based on best practice. Due to diverse localised modelling, plans and policies, there is often limited understanding of the nature of flood policy, the degree of variation between localities, and how authorities are improving practice and responding to increasing and changing risk. In this study, we develop and apply an evaluation tool for riverine flood planning that captures the modelling parameters, policies, and information used by regional authorities, distinguishing between traditional and emerging approaches. We examine three primary categories of regional flood policy: modelling parameters and associated planning regulations, risk-based policy approaches, and information provision processes. Our findings reveal evolving practices, policy variances, and aspects of contention, demonstrating where central and state governments can provide greater direction for policy development. Our evaluation tool therefore provides a basis to guide complex policy transitions, from static hazard-based planning towards a more comprehensive, risk-based approach.

year: 2025

title: Wearing moko: Maori facial marking in today’s world

authors: Nikora, Linda Waimarie

subjects: moko

abstract: The early voyagers, missionaries, settlers all reacted to the pukanohi, to the marked faces of the Maori people, during the period of first contact, and the century following it. Their accounts are vivid, judgemental, revealing, telling us as much about them as they do about the people they described.
Curiosity and horror are mixed with a genuine
fascination; where sternly evangelizing words
failed, armed confrontation occurred; and we
now live with the results, te ao hou, a new world. In this world, today, wahine mau kauae, tangata mau moko, pukanohi – wearers – are speaking for themselves, about themselves, and commenting on how others view them. Unanimously, they insist that the decision to take the marking is about continuity, affirmation, identity and commitment. It is also about wearing those ancestors, carrying them into the future; as their moko become a companion, a salient being with its own life force, its own integrity and power, beyond the face.

text: Wearing moko: Maori facial marking in today’s world The early voyagers, missionaries, settlers all reacted to the pukanohi, to the marked faces of the Maori people, during the period of first contact, and the century following it. Their accounts are vivid, judgemental, revealing, telling us as much about them as they do about the people they described.
Curiosity and horror are mixed with a genuine
fascination; where sternly evangelizing words
failed, armed confrontation occurred; and we
now live with the results, te ao hou, a new world. In this world, today, wahine mau kauae, tangata mau moko, pukanohi – wearers – are speaking for themselves, about themselves, and commenting on how others view them. Unanimously, they insist that the decision to take the marking is about continuity, affirmation, identity and commitment. It is also about wearing those ancestors, carrying them into the future; as their moko become a companion, a salient being with its own life force, its own integrity and power, beyond the face.

year: 2004-04-04