title: Simulating the impact of household energy consumption on the electricity grid

authors: Ozoh, Patrick

subjects: computer science

abstract: This paper presents a bottom-up modelling approach for stochastic production of electricity consumption profiles in households. It represents a preliminary work on individual appliance use modelling in households, as part of a bottom-up simulation to assess the impact of household consumption, and changes to consumption patterns and behavior, on the overall energy grid. By collecting household electricity consumption data, a model is developed based on daily activity profiles for individual appliances. The domestic load model obtained from simulating electricity consumption for household appliances will enable the large-scale simulation of multiple households to gain insight into individual household implications of demand-side load management strategies, as well as the combined effects on the electricity grid.

text: Simulating the impact of household energy consumption on the electricity grid This paper presents a bottom-up modelling approach for stochastic production of electricity consumption profiles in households. It represents a preliminary work on individual appliance use modelling in households, as part of a bottom-up simulation to assess the impact of household consumption, and changes to consumption patterns and behavior, on the overall energy grid. By collecting household electricity consumption data, a model is developed based on daily activity profiles for individual appliances. The domestic load model obtained from simulating electricity consumption for household appliances will enable the large-scale simulation of multiple households to gain insight into individual household implications of demand-side load management strategies, as well as the combined effects on the electricity grid.

year: 2015

title: Mapping lithology and hydrothermal alteration in geothermal systems using portable X-ray fluorescence (pXRF): A case study from the Tauhara geothermal system, Taupo Volcanic Zone

authors: Mauriohooho, Kate

subjects: pXRF

abstract: Portable x-ray fluorescence (pXRF) analyzers are widely used in the environmental and mineral exploration fields. pXRF analyzers can rapidly and inexpensively provide chemical concentrations on a variety of elements, often with detection limits of ∼1–5 ppm. We compared portable XRF results from untreated geothermal drill cuttings with laboratory XRF results from pressed pellet and lithium borate fused beads prepared from powders crushed from the same samples. It is demonstrated that the portable XRF results are accurate for many elements, particularly for those with atomic numbers greater than 17. 304 cutting samples from three drillholes in the Tauhara geothermal field were subsequently analyzed by pXRF. Downhole elemental concentrations plotted against lithological units defined on geological well logs indicate that significant variations in elemental concentrations occur, some of which correlate with logged lithology boundaries. Other chemical variations appear to define previously unrecognized subunits, as well as areas of hydrothermal alteration. We suggest that pXRF should become a routine part of the characterization of geothermal cuttings during geothermal exploration and well drilling, as the chemical results are accurate, rapid and inexpensive, and the results can be used to define lithological boundaries and potentially correlate between drillholes, therefore improving geologic, stratigraphic and hydrothermal alteration models of the geothermal field.

text: Mapping lithology and hydrothermal alteration in geothermal systems using portable X-ray fluorescence (pXRF): A case study from the Tauhara geothermal system, Taupo Volcanic Zone Portable x-ray fluorescence (pXRF) analyzers are widely used in the environmental and mineral exploration fields. pXRF analyzers can rapidly and inexpensively provide chemical concentrations on a variety of elements, often with detection limits of ∼1–5 ppm. We compared portable XRF results from untreated geothermal drill cuttings with laboratory XRF results from pressed pellet and lithium borate fused beads prepared from powders crushed from the same samples. It is demonstrated that the portable XRF results are accurate for many elements, particularly for those with atomic numbers greater than 17. 304 cutting samples from three drillholes in the Tauhara geothermal field were subsequently analyzed by pXRF. Downhole elemental concentrations plotted against lithological units defined on geological well logs indicate that significant variations in elemental concentrations occur, some of which correlate with logged lithology boundaries. Other chemical variations appear to define previously unrecognized subunits, as well as areas of hydrothermal alteration. We suggest that pXRF should become a routine part of the characterization of geothermal cuttings during geothermal exploration and well drilling, as the chemical results are accurate, rapid and inexpensive, and the results can be used to define lithological boundaries and potentially correlate between drillholes, therefore improving geologic, stratigraphic and hydrothermal alteration models of the geothermal field.

year: 2016

title: Ngā maihi o Te Whare Hukahuka, ngā maihi o Te Whare o Ruamano: Te whare kōrero o ngā maihi o Tuteao

authors: Hona, Hakahaka Charlie Barlow

subjects: Tuteao

abstract: Ko Pūtauaki te maunga
Ko Rangitāiki te awa
Ko Hekerangi te papa whenua
Ko Tuteao te marae
Ko Ngā Maihi te hapū
Ko Ngāti Awa te iwi
Ko Mataatua te waka
Tihe mauri-ora
Ko tōku kāwai rangatira tēnei. E mōhio ai te tangata ko wai ahau; nō hea ahau, nā wai hoki ahau. Ā, nā whai anō taku urupounamu, ko wai a Ngā Maihi o Tuteao? E mea ana ngā pākeke, he iwi tawhito a Ngā Maihi i heke mai i ngā tātai whakapapa o Tangaroa, o Pōtiki, o Mahutapoanui, o Toroa, o Tuteao. Hēoi, kua kore e rangona ōna kōrero i runga marae ātea. Kua kore e wānangahia i roto i te poho o te whare o Tuteao. Kua ngū ngā poupou o te whare kōrero. Ka mutu, i roto i ngā tau tata nei kua riro tītapu ngā puna o te kī, ngā whītiki o te kupu, o te hapū; kua kore e rangona ngā kōrero o Ngā Maihi i runga marae ātea. Ko te haumate o te reo i runga o Tuteao tētahi take i pēnei ai. Nō reira, kai te imu te ruhi, kai te imu te ngēngē. E noho pōhara ana a Ngā Maihi ki ngā tāonga o tōna whare kōrero. Hei te tau 2027, ka whakanuia te rautau o te whare tīpuna a Tuteao, ā i tēnei tau tonu 2022, e whai whakaaro ana te hapū ki taua kaupapa otirā ki te hanga whare tīpuna hou; he whare kaitā e uru ai te tokomaha. Nō reira, e whakaaro ana hoki ki ngā kōrero ka whakairohia ki ngā pakitara o te whare. I tēnei tau hoki kua mana te whakaako i ngā kōrero hītori o te Māori i roto i ngā kura, nō reira he aha rā ngā kōrero e wātea ana ki ngā tamariki o ngā kura e pā ana ki a Ngā Maihi? He maramara, he kongakonga, he putunga kōrero e noho marara ana i ngā wāhi tūmatanui. He uaua te kitea o ētahi atu, kei ngā wāhi tūmataiti, pēnei i te Kōti Whenua Māori, i ngā tuhinga ā-whānau, kei ngā pukapuka wānanga o te marae. Nō reira, he uaua te kite atu i tōna whānuitanga, i tōna hohonutanga. Tīmata ake i ngā kohinga kōrero o te hapū tonu o Ngā Maihi, i ōna kaumātua, i ōna wānanga, i ōna whānau. I tua atu i wā te whare pukapuka, kei ngā wāhi tūmataiti ētahi putunga kōrero hei ō mo te whare kōrero o Ngā Maihi o Tuteao. Ka mutu, kei ngā waiata, ngā haka, ngā mōteatea. Kai ngā kōrero hoki o iwi kē, e pā ana ki wō mātou tīpuna. I reira i tōtō mai i te kōrero.

text: Ngā maihi o Te Whare Hukahuka, ngā maihi o Te Whare o Ruamano: Te whare kōrero o ngā maihi o Tuteao Ko Pūtauaki te maunga
Ko Rangitāiki te awa
Ko Hekerangi te papa whenua
Ko Tuteao te marae
Ko Ngā Maihi te hapū
Ko Ngāti Awa te iwi
Ko Mataatua te waka
Tihe mauri-ora
Ko tōku kāwai rangatira tēnei. E mōhio ai te tangata ko wai ahau; nō hea ahau, nā wai hoki ahau. Ā, nā whai anō taku urupounamu, ko wai a Ngā Maihi o Tuteao? E mea ana ngā pākeke, he iwi tawhito a Ngā Maihi i heke mai i ngā tātai whakapapa o Tangaroa, o Pōtiki, o Mahutapoanui, o Toroa, o Tuteao. Hēoi, kua kore e rangona ōna kōrero i runga marae ātea. Kua kore e wānangahia i roto i te poho o te whare o Tuteao. Kua ngū ngā poupou o te whare kōrero. Ka mutu, i roto i ngā tau tata nei kua riro tītapu ngā puna o te kī, ngā whītiki o te kupu, o te hapū; kua kore e rangona ngā kōrero o Ngā Maihi i runga marae ātea. Ko te haumate o te reo i runga o Tuteao tētahi take i pēnei ai. Nō reira, kai te imu te ruhi, kai te imu te ngēngē. E noho pōhara ana a Ngā Maihi ki ngā tāonga o tōna whare kōrero. Hei te tau 2027, ka whakanuia te rautau o te whare tīpuna a Tuteao, ā i tēnei tau tonu 2022, e whai whakaaro ana te hapū ki taua kaupapa otirā ki te hanga whare tīpuna hou; he whare kaitā e uru ai te tokomaha. Nō reira, e whakaaro ana hoki ki ngā kōrero ka whakairohia ki ngā pakitara o te whare. I tēnei tau hoki kua mana te whakaako i ngā kōrero hītori o te Māori i roto i ngā kura, nō reira he aha rā ngā kōrero e wātea ana ki ngā tamariki o ngā kura e pā ana ki a Ngā Maihi? He maramara, he kongakonga, he putunga kōrero e noho marara ana i ngā wāhi tūmatanui. He uaua te kitea o ētahi atu, kei ngā wāhi tūmataiti, pēnei i te Kōti Whenua Māori, i ngā tuhinga ā-whānau, kei ngā pukapuka wānanga o te marae. Nō reira, he uaua te kite atu i tōna whānuitanga, i tōna hohonutanga. Tīmata ake i ngā kohinga kōrero o te hapū tonu o Ngā Maihi, i ōna kaumātua, i ōna wānanga, i ōna whānau. I tua atu i wā te whare pukapuka, kei ngā wāhi tūmataiti ētahi putunga kōrero hei ō mo te whare kōrero o Ngā Maihi o Tuteao. Ka mutu, kei ngā waiata, ngā haka, ngā mōteatea. Kai ngā kōrero hoki o iwi kē, e pā ana ki wō mātou tīpuna. I reira i tōtō mai i te kōrero.

year: 2022