title: Pinch Analysis of an Industrial Milk Evaporator with Vapour Recompression Technologies

authors: Walmsley, Timothy Gordon

subjects: Process Integration

abstract: The present study focuses on applying Pinch Analysis to an industrial milk evaporator case study. Modern milk evaporators are typically integrated using both mechanical and thermal vapour recompression technologies as the primary means for attaining a high level of energy efficiency. A significant step change in energy efficiency for milk evaporators is achieved in this study by modifying the set-up of the concentration processing pathway in combination with an improved heat exchanger network design. To effectively perform the Pinch Analysis, a validated mass and energy balance model of the milk evaporator case study has been implemented in an Excel spreadsheet from which appropriate stream data may be extracted. In particular the Grand Composite Curve plays a critical role in identifying where vapour recompression units, which are a type of heat pump, may be applied to reduce thermal energy use by as much as 67%, which represents an annual utility cost saving between $640 – 820k /y.

text: Pinch Analysis of an Industrial Milk Evaporator with Vapour Recompression Technologies The present study focuses on applying Pinch Analysis to an industrial milk evaporator case study. Modern milk evaporators are typically integrated using both mechanical and thermal vapour recompression technologies as the primary means for attaining a high level of energy efficiency. A significant step change in energy efficiency for milk evaporators is achieved in this study by modifying the set-up of the concentration processing pathway in combination with an improved heat exchanger network design. To effectively perform the Pinch Analysis, a validated mass and energy balance model of the milk evaporator case study has been implemented in an Excel spreadsheet from which appropriate stream data may be extracted. In particular the Grand Composite Curve plays a critical role in identifying where vapour recompression units, which are a type of heat pump, may be applied to reduce thermal energy use by as much as 67%, which represents an annual utility cost saving between $640 – 820k /y.

year: 2015-08-24

title: Conservation status of New Zealand freshwater fish, 2009

authors: Allibone, Richard

subjects: threatened fish

abstract: The threat status of 74 freshwater and estuarine fish present in New Zealand was determined. Fifty-one native taxa were ranked of which 67% were considered Threatened or At Risk. A single species was classified as Extinct, the New Zealand grayling, which has not been observed since the 1920s. Four taxa were classified in the highest threat category, Nationally Critical, and a further 10 taxa as Threatened (Nationally Endangered or Nationally Vulnerable). Twenty taxa were ranked in the At Risk group with the majority ranked as Declining. Endemic galaxiids (Galaxiidae) dominated the Threatened and At Risk taxa. The majority (68%) belonged to the Galaxias genus, comprising 81% of recognised taxa in this genus and all five species in the genus Neochanna were also ranked as Threatened or At Risk. In addition to 51 native taxa, a further three fish species were considered colonists and 20 introduced species were classified as naturalised, although two of these are considered rare. The majority of the Threatened species occur in the Canterbury and Otago regions where a suite of rare non-migratory galaxiids exist. Threat mechanisms that were identified as causal in the decline of freshwater fish species were the impact of introduced fish species, declining water quality, effects of water abstraction, loss of habitat via land-use change and land-use activities, and river modifications.

text: Conservation status of New Zealand freshwater fish, 2009 The threat status of 74 freshwater and estuarine fish present in New Zealand was determined. Fifty-one native taxa were ranked of which 67% were considered Threatened or At Risk. A single species was classified as Extinct, the New Zealand grayling, which has not been observed since the 1920s. Four taxa were classified in the highest threat category, Nationally Critical, and a further 10 taxa as Threatened (Nationally Endangered or Nationally Vulnerable). Twenty taxa were ranked in the At Risk group with the majority ranked as Declining. Endemic galaxiids (Galaxiidae) dominated the Threatened and At Risk taxa. The majority (68%) belonged to the Galaxias genus, comprising 81% of recognised taxa in this genus and all five species in the genus Neochanna were also ranked as Threatened or At Risk. In addition to 51 native taxa, a further three fish species were considered colonists and 20 introduced species were classified as naturalised, although two of these are considered rare. The majority of the Threatened species occur in the Canterbury and Otago regions where a suite of rare non-migratory galaxiids exist. Threat mechanisms that were identified as causal in the decline of freshwater fish species were the impact of introduced fish species, declining water quality, effects of water abstraction, loss of habitat via land-use change and land-use activities, and river modifications.

year: 2010

title: Te Tarata

authors: Maxwell, Te Kahautu

subjects: Haka

abstract: He whakamārama mō te haka 
Ko tēnei haka he whakamauharatanga ki te riri whenua i waenganui i Te Whakatōhea me te Karauna i te 23 o Poutūterangi 1865. Ko te ingoa o te pakanga nei ko Te Tarata. Hai tēnei marama kua eke ki te kotahi rau e rima tekau tau mai i tēnei pakanga. Ka kōrerotia te patunga i te mihinare a Te Wākana i te 2 o Poutūterangi i te tau kotahi mano e waru rau e ono tekau mā rima (1865). Nā Kereopa o Ngāti Rangiwewehi i patu a Te Wākana. I haramai a Te Kereopa i raro i te Paimārire (Hauhau) ki Ōpōtiki. Ko tā Te Paimārire kaupapa i tae atu ai ko te kauhau i te whakapono hou a Te Ua Haumēne o Taranaki. Ko ngā āpōtoro i tukuna atu e Te Ua Haumēne ko Pātara Rakataura me Te Kereopa, hoi anō ko te kauhau i te rongopai tā Te Ua Haumēne i whakahau ai. Hoi anō he take tā Te Kereopa, tā te mea i kōhurutia tana wahine me āna tamāhine tokorua ki te whare karakia i Rangiaowhia ki roto o Tainui. Nara i pau a Ngāti Apakura ki te mate ki roto i te ahi, i tahuna te whare karakia e ngā hoia me te iwi o Ngāti Apakura ki roto. Ā i patua anō tana tamāhine hoki ki te pakanga i Hairini. Koiarā tā Kereopa he rānaki i te mate o tana whānau i pau i te ahi nukarau a te Karauna. Nā tēnei patunga i a Te Wākana i riro ai te 250,000 eka o Te Whakatōhea. I tēnei rā tonu o Te Matatini i tēnei tau 2015 kua eke ki te kotahi rau e rima tekau (150) tau o te parekuranui o Te Whakatōhea mō te patunga i te tangata kotahi nā tētahi atu ko Te Kereopa o Ngāti Rangiwewehi. Ko te kōhuru i a Te Whakatōhea me āna tamariki, āna mokopuna, ko te tāwharona i ngā tāne, i ngā wāhine, ko te ekeeke kino te rarahu i ngā wāhine me ngā tamariki kōtiro, tāne hoki. Mutu ana te rarahu ko te kōhuru i a rātou ki te pū, ki te mata o te pēneti ko te tahu rānei. Ko te urupatu anō tērā ko te tahu i ngā pā, i ngā whare tīpuna, i ngā māra, i ngā mira mahi paura, i ngā kaipuke tauhokohoko ki Tāmaki, ki Poihākena, ki Ingarangi. Ko te parekura nui tēnei o Te Whakatōhea, ko te kōhuru i tō mātou katoa, tō mātou ao, tō mātou wairua, tō mātou hinengaro, tō mātou tinana o Te Whakatōhea mō te mate kotahi a te tangata kotahi. Ahakoa he mihingare, he pūrahorua hoki he kawe o kōrero nōna ki a Kāwana Kerei mō ngā nekeneke a Te Whakatōhea ki te tautoko i a Kīngi Tāwhiao me ngā pakanga whenua i Rangiriri, i Ōrakau i te tau kotahi mano e waru rau e ono tekau mā whā (1864). Ki te pakanga o Te Tarata, 14 ngā Māori i mate i tēnei pakanga me ngā hoia pākeha, ngā maemanerau 26. E 500 ngā manemanerau i roto i te ope taua a Kuini Wikitōria. I tēnei pakanga nā Hira Te Popo te rangatira o Ngāti Ira, hapū o Te Whakatōhea i herehangaia ngā tīkouka me ōna rau ki ngā pou o te tūwatawata. Nara i pupuhi ngā pūrepō ngā ki te pā o Te Tarata i hinga ngā tūwatawata me te tū anō. Koirā te mahi a te tīkouka he rākau māmā kāore i whati pēnei i te mānuka me ngā rākau mārō ehara ko tāna he tiaki i te tūwatawata ka tūohu ka tū anō me te maka anō i ngā kariri o te pūrepō ki ngā hōia a te Karauna. Ana nā te tīkouka i āhei a Te Whakatōhea me ōna haumi te rere whakauta ki te tuawhenua. I huihui rātou ki tētahi pā anō ki Kohipawa kīhai i tareka e te Karauna.

text: Te Tarata He whakamārama mō te haka 
Ko tēnei haka he whakamauharatanga ki te riri whenua i waenganui i Te Whakatōhea me te Karauna i te 23 o Poutūterangi 1865. Ko te ingoa o te pakanga nei ko Te Tarata. Hai tēnei marama kua eke ki te kotahi rau e rima tekau tau mai i tēnei pakanga. Ka kōrerotia te patunga i te mihinare a Te Wākana i te 2 o Poutūterangi i te tau kotahi mano e waru rau e ono tekau mā rima (1865). Nā Kereopa o Ngāti Rangiwewehi i patu a Te Wākana. I haramai a Te Kereopa i raro i te Paimārire (Hauhau) ki Ōpōtiki. Ko tā Te Paimārire kaupapa i tae atu ai ko te kauhau i te whakapono hou a Te Ua Haumēne o Taranaki. Ko ngā āpōtoro i tukuna atu e Te Ua Haumēne ko Pātara Rakataura me Te Kereopa, hoi anō ko te kauhau i te rongopai tā Te Ua Haumēne i whakahau ai. Hoi anō he take tā Te Kereopa, tā te mea i kōhurutia tana wahine me āna tamāhine tokorua ki te whare karakia i Rangiaowhia ki roto o Tainui. Nara i pau a Ngāti Apakura ki te mate ki roto i te ahi, i tahuna te whare karakia e ngā hoia me te iwi o Ngāti Apakura ki roto. Ā i patua anō tana tamāhine hoki ki te pakanga i Hairini. Koiarā tā Kereopa he rānaki i te mate o tana whānau i pau i te ahi nukarau a te Karauna. Nā tēnei patunga i a Te Wākana i riro ai te 250,000 eka o Te Whakatōhea. I tēnei rā tonu o Te Matatini i tēnei tau 2015 kua eke ki te kotahi rau e rima tekau (150) tau o te parekuranui o Te Whakatōhea mō te patunga i te tangata kotahi nā tētahi atu ko Te Kereopa o Ngāti Rangiwewehi. Ko te kōhuru i a Te Whakatōhea me āna tamariki, āna mokopuna, ko te tāwharona i ngā tāne, i ngā wāhine, ko te ekeeke kino te rarahu i ngā wāhine me ngā tamariki kōtiro, tāne hoki. Mutu ana te rarahu ko te kōhuru i a rātou ki te pū, ki te mata o te pēneti ko te tahu rānei. Ko te urupatu anō tērā ko te tahu i ngā pā, i ngā whare tīpuna, i ngā māra, i ngā mira mahi paura, i ngā kaipuke tauhokohoko ki Tāmaki, ki Poihākena, ki Ingarangi. Ko te parekura nui tēnei o Te Whakatōhea, ko te kōhuru i tō mātou katoa, tō mātou ao, tō mātou wairua, tō mātou hinengaro, tō mātou tinana o Te Whakatōhea mō te mate kotahi a te tangata kotahi. Ahakoa he mihingare, he pūrahorua hoki he kawe o kōrero nōna ki a Kāwana Kerei mō ngā nekeneke a Te Whakatōhea ki te tautoko i a Kīngi Tāwhiao me ngā pakanga whenua i Rangiriri, i Ōrakau i te tau kotahi mano e waru rau e ono tekau mā whā (1864). Ki te pakanga o Te Tarata, 14 ngā Māori i mate i tēnei pakanga me ngā hoia pākeha, ngā maemanerau 26. E 500 ngā manemanerau i roto i te ope taua a Kuini Wikitōria. I tēnei pakanga nā Hira Te Popo te rangatira o Ngāti Ira, hapū o Te Whakatōhea i herehangaia ngā tīkouka me ōna rau ki ngā pou o te tūwatawata. Nara i pupuhi ngā pūrepō ngā ki te pā o Te Tarata i hinga ngā tūwatawata me te tū anō. Koirā te mahi a te tīkouka he rākau māmā kāore i whati pēnei i te mānuka me ngā rākau mārō ehara ko tāna he tiaki i te tūwatawata ka tūohu ka tū anō me te maka anō i ngā kariri o te pūrepō ki ngā hōia a te Karauna. Ana nā te tīkouka i āhei a Te Whakatōhea me ōna haumi te rere whakauta ki te tuawhenua. I huihui rātou ki tētahi pā anō ki Kohipawa kīhai i tareka e te Karauna.

year: 2017