Th l Ener y H use ittau

Introduction

The reduction of the energy demand for central heating A and hot water supply in residential buildings and the hereby resulting decrease of environmental pollution is a House A is characterized especially technological challenge of the near and further future and a main taste of the energy policy as well. Both the Techni­ @ lightweight construction brick work with outside cal University Zittau and the Fraunhofer-Institut flir special heat insulation, Bauphysik Holzkirchen and various other co-operating partners realize a prototype house based on a specific @l gasfired heating coupled with hotwater maximum energy demand for heating, according to which plant, it meets the requirements of low energy houses of the future 1). e ventilation system with heat recovery from the waste gas of the gasfired this below the dew echnological esign of the point) and from the waste ouse @l earth heat exchanger for the fresh air and

design e solar collectors on the south roof

The is a semi detached house and is B characterized the following main COJl11POnlents: House B is characterized es!,eClalJlV @ heat insulation for the the exterior

walls and the roof "9"'IlnhT~1hl~,~n~ @ construction elements made of filled

in between with foamed t)l(Ji-C()nCret,e g systems gu~arante~ellJlg standard of water heating; electric fed warm water floor heating

@ ventilation of the flats with heat recovery; solar collector roof with heat transfer to the basement as a heat storage, @ maximum use of solar energy for and hot water ventilation with heat recovery and fresh air warming by the basement heat storage. house with compressed and a favorable surface/volume ratio of esearch bjectives Each semi detached house has one first and one second floor with 177 m2 area~ Construction The house will be equipped with a level of details are shown in 2. mstnlmentation and control technology as wen as acquisition and processing of measuring values at The different constructional and heating systems, based on the same time a research and training facility of the a maximum energy demand of 20 - 30 kWhlm2K, Technical University Zittau. have been calculated by the special software "ENERBED 4.5" of the new CEN-standard)~ Main fields of research and development are:

ffinnj~Ynru The low House Zittau w 2,.253 0 transmission and ven- ~ ct1 tilation heat losses C\I 300 E solar and other ~ ~ .c gains ~ 250 net heating ~ ~ energy demand

~ C :J 0 E 1 ~ 100 ~

minimum german re H german energy Zittau and saving energy IN 4180 savin 1 ard 1993

1., Net De/nand J(ejSlaenl~lal JjUJUdl,rl!?S in «j)JmnAf1r7.~~n'n with Low Energy House Zittau (LEH Zittau)

@ interaction between the different building elements and @ continue the development of building and technical other aspects such as solar gain, moisture, air elements; movement, comfort and indoor air quality;

@ investigations about the reduction of environmental

@ theoretical about the energetic balancing pollution by low energy housese of low energy houses, validity of calculation methods and software for modelling of such or other building Conclusions

The paper will show that it is possible to construct with de\'elc~nn:lQ' and testing of regulation systems in view acceptable technical methods such residential buildings of energy efficiency and load management;

2.,254 - Wilsdorf and Werner HOUSE B HOUSE A

Figure 24> View ofthe South Side which have an annual net energy demand of lower than The "Low Energy House Zittau" as a prototype should 30 and offers a selection of technologies and also become the starting point for prospective and the necessary work of 1"esearcha conscious methods of construction concerning energy demand and environmental protection in the European Region (), Lower () and North Bohemia (Czechoslovakia)a

The Low ""n&~Yn'iI' House Zittau ... 2,,255