CREST Demand Model v2.0 Eoghan McKenna & Murray Thomson

The CREST Demand Model v2.0, developed by Eoghan McKenna & Murray Thomson at Loughborough University, is a comprehensive simulation tool that analyzes the energy demand of dwellings. It considers factors such as solar thermal collectors, climate data, irradiance, electrical demand, temperature, gas demand, occupancy, hot water demand, and activity profiles. The model provides outputs related to electrical power, temperature, appliances, lighting, heating, solar energy utilization, and more.

• CREST Demand Model
• Energy Analysis
• Simulation Tool
• Loughborough University
• Eoghan McKenna

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1. CREST Demand Model v2.0 Eoghan McKenna & Murray Thomson CREST, Loughborough University

2. Inputs CREST Demand Model v2.0 n number of dwellings Parameters for n dwellings An individual dwelling Solar thermal collector model Historic climate data Irradiance model -1 PV model Outputs Electrical demand model Net dwelling electrical demand Temperature model Aggregated results for n dwellings Thermal demand model Heating control settings Dwelling gas demand Occupancy model Occupancy transition probabilities Dwelling hot water demand Hot water demand model Activity profiles

3. CREST Demand model - example simulation output for a single dwelling 0 Number of people Occupancy Active Active occupancy 4 0 00:00 8 Electrical power (kW) 80 Temperature (oC) 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 Appliances & lighting PV 6 4 2 0 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 Cylinder Emitters Indoor air Building Collector Outside air 60 40 20 0 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 Boiler to space Boiler to DHW Passive solar Solar collector Casual Heat flow (kW) 20 10 0 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00

4. CREST Demand model - validation against independent datasets Gas demand - profiles (Winter) 10 EDRP Carbon Trust Model 8 Average gas demand (kW) 6 4 2 0 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 Time of day Domestic hot water - profiles 25 EST Model Average hot water demand (litres/hour) 20 15 10 5 0 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 Time of day