Nowadays it has become obvious that in order to meet our future commitments in C02 reductions, more than one LZC technologies will have to be incorporated. Hence, we should look for hybrid LZC solutions instead of utilizing just one of them separately.
Many LZC manufacturers have identified the need for hybrid LZC systems and have started to develop Renewable Energy systems that incorporate a mix of LZC technologies. For example, PVs with SWH, or PV with wind.
For instance, Skyline Solar has developed an all-solar hybrid system that uses the best aspects of tracked PVs and concentrating solar power to lower energy costs through higher energy yield per peak watt installed. The technology is called High Gain Solar (HGS). Manufactured with the same materials as traditional solar panels, but smaller in size, the systems include a backing plate, silicon cells, encapsulant, and junction box. The novelty in the design is that the HGS system includes a metal heat sink that allows passive convection cooling.
HGS is ideal manufacturers because the components are PV rather than CSP, the size of the hybrid system is much smaller compared to a traditional CSP system. This makes the logistics much easier.
Another example which finds application in the building environment is the Volther hybrid solar collector. This system utilizes solar electric and solar thermal energy capture into one technology. Water circulates near the PV panels to absorb their heat. The hot water can then be used in the building. By producing both electricity, and heat from the same panel. Such a system is supposed to offer a quicker return on investment. The water absorption also acts as a coolant of the PV panel, increasing its conversion efficiency and longevity.
Another similar LZC hybrid system is the Echo Solar, which combines PV and SWH for homes. Rather than capturing the heat by running water through a copper tube, which could damage the roof if it leaks, Echo uses a computerized fan to draw hot air from under the solar panel at a rate of about 14 m³/min. The air can be used for space heating or hot water.
With increasing legislation such as the Energy Performance Building Directive, Part L(Building Regs) and the Code for Sustainable Homes, it is imperative to understand that the design and construction of buildings is becoming more and more complex. The M&E-Energy consultants need to work very closely with architects, structural engineers and other members of the design team in order to design and build sustainable buildings.
