Design and analysis of islanded house using distributed generation technologies

Master's assignment
Student Alaa Alzughayyar
Committee Albert Molderink, Prof.dr.ir. G.J.M. Smit, Ir. V. Bakker, Prof.dr.ir T.H.M. Meer and Ing. A.P. Haytema (Nedap)
Programme Sustainable Energy Technology - University of Twente
Finished September 2011

Abstract

The current and future energy infrastructure represents a num- ber of challenges and opportunities to maximize value through the management of peak power. This is true both on the demand-side regarding peak power use and on the supply-side regarding power generation. Using energy more efficiently through more efficient end- uses or through more efficient distributed generation, such as com- bined heat and power, reduces the amount of fuel required to produce a unit of energy output and reduces the corresponding emissions of greenhouse gases.

In this research we designed an islanded house which supposed to generate it is own energy. The house is equipped with distributed generation sources, like microCHP and solar panels. The house is also equipped with heat and electricity buffers to store the gener- ated energy. Another technology is introduced to the house is the PowerRouter machine.

Based on the islanded house model, different configurations have been developed to simulate different scenarios. The simulation is done for different electricity and heat demand profiles. We used four different demand profiles which represents four seasons. The simulation of these scenarios is a minute based discrete simulation.

To study the heat and electricity demand and supply pattern, the simulations were carried out using different buffers size. The simulations show that it will be possible to supply the demand in islanded house, but this required to find the exact battery and buffer sizes.

Further simulations and analysis were carried out for configura- tions and scenarios that include a grid connected house model to analyze the differences between an islanded house and a grid con- nected house. The same demand profiles have been used in the grid connected simulation. In these scenarios it was possible to export and import electricity from grid. We studied the effect of buffer sizes on the amount of the imported and exported electricity.

To study the feasibility of simulated configurations, an economic analysis of one case have been carried out. In this analysis we stud- ied economics of a grid connected house which include a microCHP and solar panels as well as the PowerRouter machine. Moreover another analysis have been carried out to study the profitability of using a battery based on new regulations for the amount of the own consumption.