以自然的方式构建更美好的未来.pdf

1、Building a better future the natural wayDaniel Colbourne,Re-phridge Ltd,May 2025Introduction and context Widely known that building climate control responsible for massive emissions2Green Cooling Summit 2025,20 21 May 2025AC accounts for 7%of global electricity and 3%of carbon emissionsBuilding heat

2、ing and cooling accounts for about 30%of global energy use about 5 10 Gt of CO2e emissionsEach year,energy for cooling buildings increases by 5%8%is direct emissions(refrigerants,combustion);18%indirect emissions(electricity)gas and oil heating contribute 8%of CO2e emissionsIntroduction and context

3、Society needs to avoid excessive temperatures(low and high)to exist People rely on comfortable conditions to function effectively For some(200k/year),AC avoids premature deaths,many more for heating Becoming apparent(already blatantly obvious?)that the indoor climate control needs to be achieved as

4、sustainably as possible In the past,societies found a way without excessive emissions3Green Cooling Summit 2025,20 21 May 2025Hierarchy of technologies Prioritisation of climate control technologies to minimise CO2e4Green Cooling Summit 2025,20 21 May 2025 Natural ventilation,thermal storage,green r

5、oofs,etc.Passive building climate control Ground/water source thermal exchange,desiccant cooling,evaporative cooling,etc.(Partially)free climate control With natural refrigerants With F-gasesMechanical refrigeration Oil,gas and coal driven OtherstCO2esHuman comfort Human comfort demands conditions w

6、ithin a specific range 20-25C,40-60%RH,slight airflow,limited direct sun,no cold surfaces,etc5TemperatureThermal radiationAir movementHumiditySunlightMethods of free(ish)climate control6Thermal storage 5 20 KReal greenhouse effect 20 30 KGreen roofs 10 KThermal convection 1 20 KEvaporative cooling 5