At dbHMS we integrate Green Concepts with Meticulous Mechanical,Plumbing and Airconditioning Design.Various traditional Indian passive designs which were practiced centuries back can still be utilised in modern buildings. With sound understanding of basic and equipped with latest technologies dbHMS can design passive strategies in todays modern buildings. Some of these are:
This technique utilizes temperature difference between outside and underground earth temperature to achieve heating or cooling. This system utilizes minimal active energy to achieve heating or cooling. Temperature below 6 to 7’ of earth is always cooler or warmer than ambient temperature. When outside temperature is passed through underground tunnel it looses its temperature and outcoming air is much cooler than entering air. Depending on location, earth formations and tunnel material substantial energy reduction can be achieved.
This technique utilizes temperature difference between day and night time. Locations where there is substantial diurnal temperature variation this system is very effective. Building can have a high thermal mass which can absorb heat throughout the day. This mass can be exposed to lower temperatures at night time to achieve free cooling. Same technique was widely used in old Indian buildings.
Water or thick walls can be used as a thermal storage medium. Imagine using fire tank as a thermal storage device. All heat absorbed by the building can be stored in a water tank. In evening time same water can be exposed by means of water fountains to reject its absorbed heat. This can help reduce load on active systems. This technique was used in Mughal billings.
Buildings can have water body on roof top. The water body absorbs all heat from solar radiation as well as from the building. Because of absorbed heat water evaporates reducing the temperature. This is very effective in areas where there is good availability of water.
This passive cooling technique is still in use in many houses in India. Its simplest example is desert cooler. By adding humidity or water content in air it is possible to reduce air temperature. This can be achieved either by providing wet pads misting sprays or down draft towers.
This system utilizes the earth (or a pond or lake) for both a heat source and a heat sink. Components of this system include a heat pump, a hydronic pump, a ground heat exchanger, and a distribution sub-system.