Heat Recovery Micro Systems

       Thermodynamic Technology Development

Built Environment

A/C & Refrigeration

The REHOS Generator is essentially a chiller machine, using the heat extracted from ambient to generate power. The air conditioning and refrigeration market sector would represent a large demand for modular, maybe hermetically sealed REHOS Generators, to drop the price of both air conditioning and electricity, as it is normally used together.

Buildings / Shopping Center's / Blocks of Flats / Hotels / Hospitals / Schools / Community Center's / Sport Center's / Clusters of Rural Residential Communities

For all examples listed above, consultants may work out the proper sizing of REHOS Generator that would be sufficient for the required power use. The required heat from ambient (solar heat) stored in the form of an ambient temperature solar heated water pond may then be calculated by taking the local solar incidence into consideration. A REHOS generator of 100 kWh electrical output would require ~ 125 kWh of solar incidence heat into the pond, as the conversion efficiency is around 80% (see explanation in attached pdf file). No solar heat is lost, as it is used to heat a pond of water from below ambient temperature to ambient.

Should the electrical requirements annual average be 50 kWe running 24/7/365 loaded 80% all the time (or load factor 80%) the energy that need to be acquired from the sun would be 350400 kWh and on the Highveld in South Africa with a solar incidence of around 2000 kWh / annum . m2 , the area required calculate to 175.2 square meters of water collector. Thus a pool or dam adjacent to the building of 15 m x 15 m = 225 m2 would be ample to supply the heat requirement of the solar installation with a REHOS Generation base load station of 40 kWe running 24/7/365. Very little of this solar heat is wasted, as it is stored as ambient heat source, with heat extraction forcing the temperature to drop below ambient, making heat absorption from the sun easier.

This calculation is just an example to demonstrate the viability of using a pond or dam for solar collection, delivering electricity essentially free.

Recreational Sector

Recreational facilities are very often close to water, on riverbanks, lakes or dams, or the sea. All these businesses can cut their electricity cost substantially by using REHOS technology for generation of power from ambient water sources. The water is cooled by a few degrees in the process, but solar and geothermal as well as environmental heat very quickly heat the colder water again to ambient. 

The very high heat to power conversion efficiency of the REHOS generator guarantee that only a very small amount (relatively) of heat need to be extracted to produce power, also making the required heat exchangers small and cheap.

Single households

In a typical single household using ~ 800 kWh electricity per month, a small hermetically sealed REHOS generator may produce the electricity by using solar heat captured in a small pond of only about 6 square meters, due to the high thermal waste heat to power conversion efficiency.

In the greater part of South Africa where the solar annual incidence is 2000 kWh_th / m2 per annum, the capturing pond may be 6 m2, while the higher incidence of 2500 - 3000 kWh_th / m2 per annum in desert like area's would need only 5 m2 pond. In Europe, where solar incidence may be 1000 kWh_th / m2 or lower, obviously larger water pools would be required for the same thermal power (at ambient temperatures) to power the REHOS generator.  

In this way every household could become energy-independent, revolutionizing the economy, of course.