IBPSA2013

This paper describes yearly and monthly optimization of greenhouse shells. Simulations adopt a validated building energy simulation program, adapted and re-validated for simulation of commercial greenhouses, including a tomato crop model. The work focuses on multi-objective optimization of thermal and optical greenhouse shell properties using a genetic algorithm. Analysis of optimization results is supported by sensitivity analyses.

This paper presents a sensitivity analysis of Model based Predictive Control (MPC) performance, with the final goal to rank the building and system parameters influencing the robustness of the MPC.

The aim of this paper is to develop an opti-mization algorithm to control the temperature in the occupation zone, using reduced-order ap-proaches based on POD. Two methods are em-ployed here: an adjoint-equations method and a based response surface method. These are tested on the cases of a lid-driven cavity heated by the left and a 3D ventilated cavity, similar to a room.

This paper explores a technique for generating marginal abatement cost curves for individual build-ings. It makes use of sequential optimisation and exhaustive search of building refurbishment options based on a custom building energy model developed previously by the authors.

Thermal renovation of buildings has other consequences than energy savings. In this project, a light framed renovation façade with a low U-value was added on existing heavy building envelop, for enhance its energy performance. Beyond energy saving questions we were interested by the impact of this retrofit solution on entering daylight quantity.  The problem was approached experimentally and numerically.

Today, radiant floor heating systems are generally used for heating indoor environments of residential buildings. Radiant heating is physically comfortable and energy use largely differs compared to convective heating. It is believed that one reason for that is if there is an air flow, there is a difference in surface heat transfer of the human body. The heat transfer coefficient of the human body is an indispensable parameter to evaluate the indoor thermal environment, thermal comfort and heat loads in air-conditioned and ventilated buildings.

A measurement technique was developed on capture efficiency of commercial kitchen ventilation systems affected by disturbance due to HVAC diffusers and movement of kitchen workers. In the process of development, computer simulation using RANS CFD model was applied to evaluate diffusion of gaseous contaminants emitted from commercial kitchen appliances and compared with experiments.

SRC (System of Resistances and Capacitances), is a new building thermal simulation program which uses an RC-Network representation to model the thermal flow among building elements and an H-Network rep-resentation to model the humidity mass flow among building air volumes. Two coupled systems of ODEs are formed based on these representations, which are solved using a forward numerical scheme of varying time step. This systemic approach enables a linear, time varying approximation of building’s thermal be-havior to be realized, allowing state space-based con-trol techniques to be applied.