ČVUT v PrazeFakulta stavební

Katedra technických zařízení budov

ČVUT v PrazeFakulta stavební

Katedra technických zařízení budov

Building Services Building Services Systems 20Systems 20

Building Services Building Services Systems 20Systems 20

Renewable heat Renewable heat sourcessources I I

Renewable heat Renewable heat sourcessources I I

Renewable heat sourcesRenewable heat sources Solar EnergySolar Energy

Passive SystemsPassive Systems solar windowsolar window greenhousegreenhouse accumulation wallaccumulation wall

Renewable heat sourcesRenewable heat sources Solar architectureSolar architecture

location in the countrylocation in the country building planbuilding plan thermal insulationthermal insulation balanced accumulation of the structurebalanced accumulation of the structure additional heating systemadditional heating system minimizing of heat gains in summer by minimizing of heat gains in summer by

shadingshading

Renewable heat sourcesRenewable heat sources Active solar systemsActive solar systems

water, air collectorswater, air collectors photovoltaics cellsphotovoltaics cells

Renewable heat sourcesRenewable heat sourcesGeothermal energy - Heat Geothermal energy - Heat

pumpspumps Evaporator, compressor, Evaporator, compressor,

condenser, reducing valvecondenser, reducing valve EvaporatorEvaporator

air, water, soilair, water, soil CondensatorCondensator

low temperature heating, low temperature heating, hot water, swimming poolhot water, swimming pool

Efficiency - Efficiency - OutputOutput//Input= avg.2,4Input= avg.2,4

http://www.geoexchange.org/frames/case_studies.htm

Energy of environment

Utilisation: heating, hot water

Compressor

Medium vapour

Compressed hot vapour

Liquid mediumCooled medium

Evaporator

Condenser

Reducing

valve

Heat pumps - Heat pumps - alternatives of heat alternatives of heat

sourcessources

Combined heat and Combined heat and power generation (CHP)power generation (CHP)

gas engine with gas engine with el.power generatorel.power generator

cooling of the engine cooling of the engine is the heat sourceis the heat source

output e.g. 42 kW output e.g. 42 kW heat, 25 kW electricheat, 25 kW electric

Fuel CellsFuel CellsIn principle, a fuel cell operates like In principle, a fuel cell operates like

a battery. Unlike a battery, a fuel a battery. Unlike a battery, a fuel cell does not run down or require cell does not run down or require recharging. It will produce recharging. It will produce energy in the form of electricity energy in the form of electricity and heat as long as fuel is and heat as long as fuel is supplied.supplied.

A fuel cell consists of two A fuel cell consists of two electrodes sandwiched around electrodes sandwiched around an electrolyte. Oxygen passes an electrolyte. Oxygen passes over one electrode and hydrogen over one electrode and hydrogen over the other, generating over the other, generating electricity, water and heat.electricity, water and heat.

http://www.esru.strath.ac.uk/http://www.esru.strath.ac.uk/EandE/Web_sites/00-01/EandE/Web_sites/00-01/fuel_cells/fuel_cells/