Vitvarueffektivisering med hjälp av värmelagring : Simuleringsstudie kring energiförsörjning av vitvaror med hjälp av värmepump & ackumulatortank

Sammanfattning: The constant need of energy is something that affects us all no matter our current situation. Whether we are driving our car to work, taking the elevator or using the oven to cook dinner we end up relying on energy. Our whole society is continuously striving to achieve a higher grade of efficiency and the process of supplying ourselves with energy is no exception. The importance of appliances in our everyday life cannot be exaggerated and thus the importance of their high efficiency. Efficiency is already a keyword in the appliance industry with labels, stars and numbers helping us choosing the most suitable option for the task ahead. No matter how efficient appliances often use pure electricity as their energy source. This is where the heat pump shines being an excellent way of removing excess heat where it is not needed to somewhere where it is put to good use.    The goal of this study is to research the possibility of supplying a range of household appliances with a single solution built around a heat storage tank, this being a far simpler and cheaper solution then supplying each and every one of them with their own solution. The storage tank will act as a buffer during the peak periods of usage will be supplied with energy by a heat pump.   The system has been modeled with Comsol, a calculation and simulation software, to be able to preserve details as close to reality as possible. Different storage tank sizes combined with different heating values has been tested to determine the optimal combination.   Results show that the system is a plausible solution to the problem and that a compressor using 290W to supply the storage tank with 1000W of heat is enough to handle the peak periods of the appliance usage. The efficiency of the system depends on the heat source and while using the exhaust air from the household is recommended, the study presents two more options. The key to handling the peak periods is the storage tank acting as a buffer then being reheated over time.