Showing papers in "Energy and Buildings in 2001"

TL;DR: EnergyPlus as discussed by the authors is a building energy simulation tool that includes a number of innovative simulation features such as variable time steps, user-configurable modular systems that are integrated with a heat and mass balance-based zone simulation, and input and output data structures tailored to facilitate third party module and interface development.

TL;DR: In this paper, the analysis of the thermal properties and energy performance of the green roof was carried out in two phases: during the first phase, extended surface and air temperature measurements were taken at the indoor and outdoor environment of the buildings where the green roofs had installed and during the second phase of the study, the thermal and energy saving were examined, through a mathematical approach.

TL;DR: The study encompasses the validation of the dynamic, RADIANCE-based daylight simulation method DAYSIM, which uses the concept of daylight coefficients and the Perez sky model to predict the short-time-step development of indoor illuminances, and it has been found that the treatment of direct sunlight strongly influences the accuracy of the daylight coefficient method.

TL;DR: In this article, a field study of the thermal comfort of workers in natural ventilated office buildings in Oxford and Aberdeen, UK, was carried out which included information about use of building controls.

TL;DR: In this article, the authors investigated the evapative cooling effect from roof lawn gardens planted in non-woven fabric as one mode of passive cooling, and found that the amount of heat coming into the rooms was reduced by a roof lawn garden.

TL;DR: In this paper, a life cycle simulation tool has been developed and linked with thermal simulation to evaluate the environmental impacts of material fabrication and other processes (energy, transport, etc.) An application of this tool is presented here concerning the comparison of three houses: the present construction standard in France (reference), a solar and a wooden frame house.

TL;DR: Uncertainty analysis has been used in several research projects in order to estimate reliability of results, especially in empirical validation-based projects where both measured and predicted uncertainty bands need to be evaluated as discussed by the authors.

TL;DR: In this article, the authors present field measurements on daylighting for a fully air-conditioned office building in Hong Kong and find that daylighting schemes can result in substantial energy savings in air conditioned office buildings in Hong Hong Kong.

TL;DR: In this paper, the adaptive fuzzy PD controller adapts the inputs and outputs scaling factors and is based on a second order reference model, in such a way that the measured variable to be as closer as possible to the reference model.

TL;DR: In this paper, an innovative and self-adaptive integrated system for building energy and comfort management has been developed both artificial and natural lighting controllers have been designed in order to fit the integrated approach.

TL;DR: In this article, a prototype information monitoring and diagnostic system (IMDS) is presented, which consists of a set of high-quality sensors, data acquisition software and hardware, and data visualization software including a web-based remote access system.

TL;DR: In this paper, the authors used tracer gas dilution technique to detect various malfunctions in several air handling units and found that the real energy recovery efficiency was between 60 and 70% for units having a 80% nominal efficiency.

TL;DR: In this article, the authors presented estimates for air change (ventilation and infiltration) energy use in non-industrial buildings for 13 countries, and estimated financial expenditures, as well as carbon dioxide emissions associated with this energy use are indicated.

TL;DR: In this article, the authors evaluated the feasibility and viability of widening the use of WACS by the provision of centralized, district-wide water supply systems, which include seawater supply systems for once-through condenser cooling or for making up of water losses at cooling towers, and district cooling systems.

TL;DR: In this article, the thermal performance of a double U-pipe borehole heat exchanger can be assessed with a response test, which allows the in situ determination of the thermal conductivity of the ground in the vicinity of a BH, as well as the effective thermal resistance of this latter.

TL;DR: In this paper, the authors used QUICKcontrol, a software tool, to perform the complex and fully integrated building, HVAC and control simulations, which was used to determine the comfort enhancement and energy saving potential with new control strategies for the Human Science Building at the University of Pretoria.

TL;DR: In this paper, the authors explored the potential of using natural ventilation as a passive cooling system for new house designs in Thailand and developed comprehensive design guidelines for natural ventilation at both the site planning and individual house levels by using computational fluid dynamics.

TL;DR: In this article, the fundamental difference between winter preheating and summer cooling potential of buried pipe systems under Central European climate, as well from an energetic as from an economic point of view, is examined.

TL;DR: In this paper, the authors investigated the influence of the thermal insulation layer in the outside walls on the yearly cooling load and yearly maximum cooling demand in two typical residential flats in a high-rise residential building by employing HTB2.

TL;DR: In this paper, the authors examined three kinds of residential buildings with different construction techniques and estimated the decreased amount of energy consumption and resources resulting from use of recycled materials, and showed that the energy consumption needed to remake housing materials from recycled materials is lower than that to make new housing materials.

TL;DR: In this article, a real-time predictive dynamic operation of building thermal systems is explored, and an approach that combines dynamic programming and on-line simulation is developed, to efficiently solve the problem in real time.

TL;DR: In this paper, an experimental investigation was carried out to analyse the effect of using trees for solar control of buildings by shading, and the results showed that plants constitute an excellent passive system for solar controlling of buildings offering significant advantages over conventional artificial sunscreens.

TL;DR: In this paper, a computational study of buoyant flow in a roof of triangular cross-section has been carried out for the two-dimensional laminar natural convection under winter day boundary conditions.

TL;DR: In this article, the authors discuss a methodology and comments simulations that help in answering that question and show that the impact of energy efficient new construction on the CO2 release remains quite marginal if the period considered does not extend beyond a decade.

TL;DR: In this article, the authors compared the performance of simulation problem analysis and research kernel (SPARK) and the HVACSIM+ programs by means of benchmark testing and showed that the graph-theoretic techniques employed in SPARK offer significant speed advantages over the other methods for significantly reducible problems and that even problem portions with little reduction potential can be solved efficiently.

TL;DR: In this article, a quadratic linear regression equation for predicting the total cooling system power in terms of the controlled and uncontrolled variables was developed using simulated data collected under different values of controlled variables.

TL;DR: In this paper, a model-based feed-forward control scheme is proposed to improve control performance over traditional PI(D) and detect faults in the controlled process, which uses static simulation models of the system under control to generate feedforward control action.

TL;DR: In order to obtain long-term predictions based on short-term data, a neural network model was developed in this article, where the model parameters are indoor and outdoor temperature difference and energy for heating an apartment.

TL;DR: In this paper, a simple model for the annual energy balance of the window taking solar radiation and heat losses into consideration has been further developed and analyzed, and the energy balance and the cost efficiency for several glazing combinations are evaluated for buildings with different balance temperatures in a typical mid-Swedish climate.

TL;DR: In this paper, the spectral bi-directional transmittance functions (BRTF) were measured for a range of incidence angles, using the Cardiff goniospectrometer, and the thermal properties were measured with an illuminated hot box.