Zero energy architecture

Arch. Dimitar Paskalev
Zero energy architecture team leader and coordinator


Energy independence of the buildings is possible and perspective goal for todays science. Solar, wind and earth renewable resources, combined with energy saving technologies can reduce drasticly usage of the non-renewable energy.

Our main focus is to reseach and develop a complex solutions for acheving cost-efective zero energy consumption of the buildings. We recognise the building enevelope as a main subject for conceptual changes. We recognise the building mass as a valuable energy storing resource. We recognise the instalations as a motor of new high-performance energy delivering, managing and transforming systems.

We develop our own concepts, strategies and design solutions, using complex approach, that will change the architecture of tomorrow!

R&D services

  •  Arhitectural design strategy
  • Facade design: concept design
  • Cost estimation and concepts evaluation

Current Projects

Students Hospise, Sofia

ZEB 1 : Energy autonomous office building, Bojurishte Industrial Zone

Plovdiv Municipality Reconstruction



Energy modeling


Dipl. Ing. Arch. Milan Rashevski
Energy modeling development and coordination team coordinator



Energy simulation process is the main part of energy design. It can predict the complex results of implementation of the energy saving masurments and installed renewable enrgy systems. The energy simulation of the buildings interfere the inner demands and outer conditions in long therm cycles. The process becomes even more complexed with seasonal energy storages.

Our R&D efforts are focused on developing software algoritms and sceintific calculation methods for precise simulation of the energy behaviur of the building using energy storages.

R&D Services

Our R&D services in the area of Energy modeling  include:

  • Building energy simulation
  • Dynamic building models
  • Energy efficiency mesurments and techniques

Current Projects

We are involved in the following selected projects:
  • IZEB software for energy simulation of ZEB buildings

Daylight and shading


Dipl Eng. Kiril Velkovsky
Daylight and shading research and coordination

Shading systems are the only popular dynamic systems in the building industry, that can react on the changing environment, supplying quality daylight into the inverior. Till now the shading building physics is still not well understood from the building industry, consultants and clients. There is a vast gap between avanguard solutions and mass production. 

R&D Services

Our R&D services in the area of Daylight and shading  include:

  • specially designed shading systems for building purpouses
  • industrial development of new shading systems
  • facade integration of shading systems
  • BMS algoritms for controlling shading systems

Current Projects

On the topic of Daylight and Shading, we are/were involved in the following selected projects:
  • Energy Flex System - innovative retrofit solution
  • Sun-Ra System - photovoltaic and led integrated shading
  • Gen-Co - micro-concentration high temperature shading system

Energy storage


Eng. Valentin Vasillev
Energy Storage team leader and coordinator

The energy storage is the Holy Grail of the renewable energy based economy. This topic is on very basic level of understanding from the building industry. Together with incorporated solar energy systems, energy storage gives to the building real solutions for acheving Zero energy consumption and even Off the grid. Our main efforts are to develop cost effective storage solutions wiith integrated installation processes for building energy cycles.

R&D Services

Our services in the area of energy storage are:

  • cost effective thermal seasonal energy storages: building integrated
  • cold storages and system for night cooling
  • bilding mass activation 
  • construction and estimation of big thermal energy plans 

Current Projects

On the topic of Thermal energy storage, we are developing the following selected projects:
  • water based seasonal energy storage
  • chemical thermal energy storage for building aplications
  • thermal storage in big water basins

Experimental facade systems


Eng. Veneta Novakova
Experimental facade systems team leader and coordinator


The existing understanding of facades is more as reflective rather than absorbing surfaces. Glass coatings and shading systems tend to reject the valuable solar input and roofs are not always enough as building absorbing surfaces to cover greater energy demands. It is important to change the general understanding of the façade and convert it in a collector, simultaneously improving the internal comfort level.

We are focussed on creating conceptualy new ABSORBING facades – light, transparent, actively controlled envelope absorbing renewable energy for building purposes; increased thermal but not physical building mass, flexible to external conditions and internal demands; higher visual, thermal and acoustic comfort levels.

R&D services

Our R&D services in the area of Experimental facade Systems include:

  • Concept design
  • Prototyping
  • Pilot projects
  • Developing to industry levels
Current projects
On the topic of Facade Systems, we are/were involved in the following selected projects
  • Industrial developmpent of water flow glazing
  • Three generative facade systems (managing heat, PV and daylight)
  • Bionic facades

Building integrated micro-wind


Eng. Ilia Radiev


Huge amount of wind energy attacks the building envelope. Buildings are big wind concentratrs. Our innovative approach includes deep analysis of the local wind resources, creating new generation technologies that can get use of this energy. Those technologies are ready to be incorporated into a harmonic architectural design.

We are focused on developing low noise, building integrated and cost-effective wind turbins with cooperation and understanding of design, aestetic and other architectural demands.


R&D services

  • Aerodynamic testing ground
  • Facilities ruling the behavior and characteristics of the flow - compressors, turbines, air conditioning system to control humidity and temperature
  • Sensors for monitoring and equipment for data collection accompanying audit - animometri, barometers, thermometers, infrared / thermal Camera, slow motion camera.
  • Equipment and software for visualization and processing of received information.
  • Detailed physical model of target building or environment - neighborhood or city (scale factor is defined by accuracy requirements.
  •  Weather conditions simulatios
  • Computation fluid dynamics


Building integrated wind turbines