Energy Saving In Building Ventilation
Author(s)
A. D’Este, A. Gastaldello & L. Schibuola
Abstract
The actual trend of the new standards regarding indoor air quality is to increase
the ventilation rates in order to improve the comfort and the healthy levels in
buildings. As external air treatment cost in a HVAC system is a considerable
quota of the global annual management charges, the possibility of reducing the
energy consumption due to the ventilation is strongly suggested. A direct heat
recovery from the exhaust air is the most used technique and a great variety of
heat exchangers, with the ability to recover just the sensible heat or also the
latent heat, are available. Another possibility is the use of the expulsion air as a
cold source for a heat pump as its temperature level permits excellent COP
(thermodynamic recovery). The heat pump can be installed alone or combined
with the heat exchanger which should be installed before the heat pump
evaporator to ensure the best performance. A comparison between these
techniques has been carried out by simulating the performance of the different
recovery system configurations in order to evaluate the energy and the economic
saving. The results for different typical application cases, in terms of occupancy
levels and ventilation rates, are presented here and discussed for various climatic
conditions.
Keywords: indoor air quality, ventilation, heat recovery, heat pump, energy
saving, economic saving.
1 Introduction
The new standards and the modern HVAC design tendency give increasingly
importance to indoor air quality to achieve a full comfort in buildings. This
involves to increase the ventilation rates in buildings such as schools, restaurants
and offices and to impose the mechanical ventilation also where it was not
usually compulsory in the past like for example in the smoking areas. In this way
Keywords
indoor air quality, ventilation, heat recovery, heat pump, energy
saving, economic saving.
Related Book
Other papers in this volume
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