Question: fhmt 36 the energy consumption associated with a home water...
- (FHMT 36) The energy consumption associated with a home water
heater has two components: 1) the energy that must be supplied to
bring the groundwater up to the storage temperature as it replaces
the water drawn from the tank 2) the energy to compensate for heat
losses while the water is stored (called standby losses). A family
of four uses 100 gallons per day of hot water, and groundwater is
available at 15°C. Typical standby losses for a water heater are
around 145 W (around 500 Bth/hr).
- What is the annual energy consumption to keep the water at 55°C?
- If electricity costs $0.12/kWh, what is the annual cost to heat water using electric resistance heaters?
- For the same $0.12/kWh as b), what is the annual cost using a heat pump with COP = 3?