IBPSA2007

The effects of groundwater direction on performance of geothermal heat pump systems were analyzed using a 3-D finite difference method with rectangular meshes. Each borehole was approximated by a square column with the actual circular borehole section circumscribing the approximated square section. The fluid temperatures inside each borehole were calculated by discretizing borehole vertically into different segments.

An economic and environmental analysis on residential internal combustion engine (ICE) based cogeneration in Canada was performed. Information from three publicly available databases was used to model four houses to be used in simulation. One house per Canadian region was chosen and modeled in ESP-r. Annual simulations using the existing space and domestic hot water heating equipment were performed and these base case results were compared to the results using the ICE based cogeneration system.

Large, multi-use sports and recreational facilities provide a unique, yet challenging, opportunity for energy conservation due to their large process loads. The proposed paper describes the use of building simulation to aid in mechanical system and architectural design to improve heat recovery from process heat generation to satisfy building loads. The focus of this study is a recreational facility that consists of an NHL-size ice arena, 8-sheet curling rink, a gymnasium, change and restrooms, offices, library, fitness studios, a large glazed atrium, as well as 50 metre lap, leisure, outdoo

The present paper is an attempt to bridge the gap between building designers and simulationists by proposing a common framework for discussion. It is a positional paper written from a building designer’s viewpoint that basically agrees with the proposition that design is no longer dominated by physical structure thinking but by performance and system based concerns.

This work presents energy and exergy comparison of several design options for combination between dwelling ventilation and domestic hot water production. The dwelling ventilation uses mechanical exhaust with natural air supply (without heat recovery) or balanced ventilation with heat recovery. The outlet ventilation air is used as a heat source for domestic hot water, by using a heat exchanger or a heat pump.

The last object of this study is to develop standard method for building insulation performance on-site evaluation using Infra-red camera.

In this article, we would like to estimate the surface temperature and heat flow pattern of the four corner walls of building envelope with thermal bridge. In doing so, this study made use of infra-red camera and the heat transfer simulation. The field measurement using infra-red thermography shows thermal bridge and thermal insulation performance of each part of actual existing building envelope.

As a passive cooling strategy, natural ventilation is an energy conservation technology with great developing potential. The typical technologies of natural ventilation include night ventilation and natural ventilation with heat storing materials. The factors which affect ventilation include technique parameter, climate parameter and building’s parameter. The natural ventilation in summer in a typical building in Changsha City, which locates in hot summer and cold winter area, was measured.

It is the goal of climate-adapting buildings to make used of the natural regularity to decrease indoor temperature and improve thermal comfort. In the aviation building in Sanya airport, the control mode of thermal environment—combination of natural ventilation, air modulation by mechanical fans and air-conditioning is promoted. The CFD software PHOENICS is employed to simulate the potential of natural ventilation and air modulation by mechanical fans in different plans under typical meteorological conditions of Sanya in summer.

The updated ISO 13790 Standard is part of the new set of CEN Standards that supports the European Energy Performance of Buildings Directive (EPBD) requirement for a general framework for calculation of the energy consumption of buildings. The Standard sets out procedures for space heating and cooling energy calculations, allowing the use of three different methods: a simplified monthly quasi-steady state method, a simple-hourly method and detailed simulation. This paper examines the implications of allowing different methods to be used for assessing the energy usage.