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Martin Heine Kristensen

Bio: Martin Heine Kristensen is an academic researcher from Aarhus University. The author has contributed to research in topics: Step-index profile & Diffraction. The author has an hindex of 9, co-authored 19 publications receiving 291 citations. Previous affiliations of Martin Heine Kristensen include United States Department of Energy & Aarhus Municipality.

Papers
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Journal ArticleDOI
TL;DR: An investigation of how two different levels of a-priori information about input parameters, applied to three different SA methods, influenced the identification and ranking of the input parameters that the annual energy need output of a quasi-steady-state BEM, and a simple dynamic BEM using hourly time steps, is most sensitive to.

88 citations

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TL;DR: In this article, a bottom-up model of large groups of residential buildings using data from public building registers, weather measurements, and hourly smart-meter consumption data is presented, based on describing district heating consumption using a modified version of the building energy model described in ISO 13790 in combination with a model of the domestic hot water consumption.

63 citations

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TL;DR: A multilevel take on the challenge of establishing archetypes using Bayesian inference techniques and dynamic building energy modeling of arbitrary temporal resolution where uncertain parameters are fitted for individual building models and the archetype model simultaneously is proposed.

60 citations

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TL;DR: In this paper, the effect of different temporal aggregation levels of commercial smart meter data on building energy model (BEM) calibration is investigated, and the performance of the emulator was subsequently tested on an unseen validation data set.

37 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the performance of diffuse ceiling ventilation in a classroom and found that the system with an 18% diffuse ceiling opening area is able to handle the highest heat load without discomfort.

36 citations


Cited by
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Journal ArticleDOI
TL;DR: A review of studies developing data-driven models for building scale applications with a focus on the input data characteristics and data pre-processing methods, the building typologies considered, the targeted energy end-uses and forecasting horizons, and accuracy assessment.

422 citations

01 Dec 2015
TL;DR: In this article, a review of emerging simulation methods and implementation workflows for bottom-up urban building energy models (UBEM) is presented, as well as an outlook for future developments.
Abstract: Over the past decades, detailed individual building energy models (BEM) on the one side and regional and country-level building stock models on the other side have become established modes of analysis for building designers and energy policy makers, respectively. More recently, these two toolsets have begun to merge into hybrid methods that are meant to analyze the energy performance of neighborhoods, i.e. several dozens to thousands of buildings. This paper reviews emerging simulation methods and implementation workflows for such bottom-up urban building energy models (UBEM). Simulation input organization, thermal model generation and execution, as well as result validation, are discussed successively and an outlook for future developments is presented.

410 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present a whole host of processes which can enhance and tailor the properties of both conventional and not-so-conventional fibre Bragg gratings, including multi-photon excitation of germanosilicate based defects with CW 244 nm light.
Abstract: Although mainstream grating writing, more often than not using single photon excitation of germanosilicate based defects with CW 244 nm light, remains the key technology for complex devices it is now being complemented by a whole host of processes which can enhance and tailor the properties of both conventional and not-so-conventional fibre Bragg gratings. Further, processes for writing of gratings in non-germanosilicate fibres have also continued to develop and include multi-photon excitation directly into the band edge of the glass. It is now possible to custom tailor a gratings property based on the application and the nature of production as well as custom tailor the grating writing process to suit the type of fibre and application. Examples and suggestions where these can benefit sensors and lasers are outlined.

282 citations

Journal ArticleDOI
TL;DR: A review of photonic crystal fiber sensors is presented; two different groups of sensors are detailed separately: physical and biochemical sensors, based on the sensor measured parameter.
Abstract: Photonic crystal fibers are a kind of fiber optics that present a diversity of new and improved features beyond what conventional optical fibers can offer. Due to their unique geometric structure, photonic crystal fibers present special properties and capabilities that lead to an outstanding potential for sensing applications. A review of photonic crystal fiber sensors is presented. Two different groups of sensors are detailed separately: physical and biochemical sensors, based on the sensor measured parameter. Several sensors have been reported until the date, and more are expected to be developed due to the remarkable characteristics such fibers can offer.

235 citations

Journal ArticleDOI
TL;DR: In this paper, a compact in reflection modal interferometer consisting of a stub of large-mode area photonic crystal fiber (PCF) spliced to standard fiber is presented.
Abstract: A compact in reflection modal interferometer consisting of a stub of large-mode area photonic crystal fiber (PCF) spliced to standard fiber is presented. In the splice, the voids of the PCF are fully collapsed allowing so coupling and recombining PCF core and cladding modes. The interferometer is highly stable over time and can be used for different applications. The measuring of refractive index in the 1.33–1.45 range with high sensitivity is demonstrated. Sensing applications based on refractive index changes are also feasible.

142 citations