Abstract
Recently, the extended matching indices for electrical
and thermal energy were defined for different types of
energy use and conversion based on two basic matching
indices: on-site energy fraction (OEF), which is the load
proportion covered by the on-site generated energy, and
on-site energy matching (OEM), which is the on-site
generated energy proportion utilized by the load rather
than being dumped or exported. Additionally, the overall
weighted matching index (WMI) was proposed, combining the
extended indices by multiplying them by certain weighting
factors expressing the preferences of each. This study
presents a new model calculating the weighting factors of
the WMI based on the non-renewable primary energy factors
of different energy carriers involving the imported fuel,
for micro-cogeneration (µ-CHP) under thermal and
electrical tracking strategies, with electrical and
thermal heat grid feed-in schemes reflecting two opposite
extreme matching situations in the net zero energy
building: load-matching priority and energy export
priority strategies. The model is generic and can be used
for hybrid micro-generation options. As a case, a single
family house served by a µ-CHP is analyzed under a wide
range of electrical outputs and power-to-heat ratios. The
µ-CHPs' characteristics are selected according to the
highest WMI
| Original language | English |
|---|---|
| Pages (from-to) | 490 - 503 |
| Journal | Energy and Buildings |
| Volume | 80 |
| DOIs | |
| Publication status | Published - 2014 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- energy matching analysis
- zero energy buildings
- micro-cogeneration
- thermal tracking
- electrical tracking
