Energy performance comparison of three innovative HVAC systems for renovation through dynamic simulation

Abstract

Energy performance comparison of three innovative HVAC systems for renovation through dynamic simulation. Buildings, http://dx.doi.org/10. 1016/j.enbuild.2014.07.059 Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. Energy and Permanent link to this version:http://urn.kb.se/resolve?urn=urn:nbn:se:du-15163 Energy and Buildings 82 (2014) a b s t r a c tIn this paper, dynamic simulation was used to compare the energy performance of three innovative HVAC systems: (A) mechanical ventilation with heat recovery (MVHR) and micro heat pump, (B) exhaust ventilation with exhaust air-to-water heat pump and ventilation radiators, and (C) exhaust ventilation with air-to-water heat pump and ventilation radiators, to a reference system: (D) exhaust ventilation with air-to-water heat pump and panel radiators. System A was modelled in MATLAB Simulink and systems B and C in TRNSYS 17. The reference system was modelled in both tools, for comparison between the two. All systems were tested with a model of a renovated single family house for varying U-values, climates, infiltration and ventilation rates.It was found that A was the best system for lower heating demand, while for higher heating demand system B would be preferable. System C was better than the reference system, but not as good as A or B.The difference in energy consumption of the reference system was less than 2 kWh/(m 2 a) between Simulink and TRNSYS. This could be explained by the different ways of handling solar gains, but also by the fact that the TRNSYS systems supplied slightly more than the ideal heating demand.

A novel coupling control with decision-maker and PID controller for minimizing heating energy consumption and ensuring indoor environmental quality

“…In addition, above 70% of building energy in Germany is consumed by the space heating (Wang, 2015). Similar statistical results occur in the major of other countries, where around 40% of total annual energy has been consumed in buildings (Gustafsson et al, 2014; Liu et al, 2010). Demand controlled ventilation (DCV) could be used to reduce heating consumption while maintaining an acceptable indoor environment (Jia et al, 2016).…”

Techno-economic analysis of energy renovation measures for a district heated multi-family house

“…The conversion of radiators to ventilation radiators implies installing air ducts through the wall behind them. The radiators will then preheat supply air and enable a lower water temperature in the heating system [22,39]. In C2, 7 of the 14 radiators in each zone were converted to ventilation radiators, giving an air flow of 8.9 l/s per ventilation radiator.…”

“…As a result, the district heating temperature will also be better suited for low-temperature heating systems, such as floor heating or low-temperature radiators, with distribution temperatures of 35 -45 °C [21]. Previous studies by Gustafsson et al [22,23] have shown that exhaust air heat pump (EAHP) and mechanical ventilation with heat recovery (MVHR) can both be beneficial solutions, with respect to cost and energy consumption, for energy renovation of single family houses in northern and central Europe, and that the advantage of heat recovery from exhaust air becomes larger in cold climates. Furthermore, these studies showed that low-temperature radiator systems improve the energy performance of heat pumps.…”

Evaluation of Seasonal Exergy Efficiency of Air Handing Unit / Vėdinimo Įrenginio Sezoninio Ekserginio Naudingumo Vertinimas

“…Nagrinėto pastato vėsinimo sistemos ekserginis efektyvumas dar žemesnis -6,81 %. Gustafsson et al (2014) taikydami net kelias modeliavimo priemones -Matlab Simulink ir TRNSYS -tiria tipišką šiaurės vakarų Europos gyvenamąjį namą. Modeliuojamos kelios to paties namo šildymo sistemos, naudojančios šilumos siurblį.…”