Smart meter enabled control for variable speed heat pumps to increase PV self-consumption

• In the last five years the costs of photovoltaic systems have decreased considerably making it economically attractive to generate electricity locally. In many countries, self-consumption is the most attractive option to make use of the generated electricity. Variable speed heat pumps - if controlled properly - can take a share of the PV electricity to decrease costs and CO2 emissions for heat generation and increase PV self-consumption. This paper discusses a control strategy that uses real-time smart meter readings and adjusts the compressor speed to adapt heat pump electricity consumption depending on the available PV power. The approach is tested in a detailed building simulation. Self-consumption can be increased by 6% compared to a heat driven control. For the chosen PV size of 10kWp in a German multi-family house, an increase of storage size shows only little possibility for a further increase in self-consumption.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

Keyword

Carbon dioxide

Electric power generation

Heat pump systems

Heating

IIR filters

Photovoltaic cells

Pumps

Refrigeration

Smart meters

Building simulation

Control strategies

Electricity-consumption

Generate electricity

Heat-driven

Meter readings

Photovoltaic systems

Variable speed

Electric power measurement

Publication and Content Type

ref (subject category)

kon (subject category)