Design and Simulation of a PV and SDHW Systems using TRNSYS for Graphit Kropfmühl Aktien Gesellschaft Training School in Ancuabe
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Mozambique is a country with some problems concerning the interconnection of electric grid and lack of local distributor of fossil fuels like GPL, gasoline and diesel in many districts. Due to the lack of fuel distributors the price of mentioned fossil fuels increases when moving away from the main three harbors (Nacala, Beira and Maputo) to the inland and many roads are not in good condition for driving fuel trucks. Even in districts where are already connected to the national electric grid it is often observed cut off due to different kind of problems such as obsolete infrastructure, stealing of electric components and lack of alternative (back up) electric grid and resource.The aim of the present project is to design and simulate a stand-alone photovoltaic system and a solar water heating system for a projected training school in Ancuabe district at the Northern Province of Cabo Delgado. The school project is owned by a Germany mining company called Graphit Kropfmühl AG with graphite exploitation concession in Mozambique. These systems were simulated using TRNSYS software, a transient simulation program.In the modeling of those systems in TRNSYS all required components where represented by different Types. The results for the photovoltaic system were optimized in such way that the total power consumption comes totally from the system. So to fulfill this goal it was important to monitor the simulation indicator of power coming from grid in order to reduce to zero, without increasing the batteries capacity. Due to this a considerable dumped power were observed and it can be directed to the workshop during the day for the light and low power appliances. Dumped power is the power which is produced and is not used by the system, in other hand the power from grid is the power that the user has to pay from available electricity grid around or it is the power that is not covered by the installed photovoltaic system.In other hand for the solar water heating system it was optimized so that throughout the year the load hot water temperature during the shower time in dormitory is between 39-40oC as recommended and at the same time the system is designed to work without an auxiliary heating to avoid extra cost with other kind of energy for the auxiliary heater.The goal of the systems optimization with TRNSYS is to have best gains without increasing the system and consequently reducing the high initial investment cost.
Place, publisher, year, edition, pages
2012. , 66 p.
Photovoltaic system, solar hot water system, TRNSYS, optimization, power, cost.
IdentifiersURN: urn:nbn:se:kth:diva-116461OAI: oai:DiVA.org:kth-116461DiVA: diva2:589690
Subject / course
Master of Science - Sustainable Energy Engineering
Kjaerboe, PeterNhumaio, Geraldovon Grabe, Jörn