Wind Energy is Needed for Electrifying our Economy

Recent disputes between offshore wind operators and Massachusetts regulators highlight how our clean energy future is far from guaranteed. The two projects in dispute, Commonwealth Wind and SouthCoast Wind (formerly Mayflower Wind), together with Vineyard Wind Project 1, make up 3.2 gigawatts of offshore wind energy Massachusetts has planned for 2030. These offshore wind projects are essential to decarbonizing our electric grid and meeting the growing demands of key sectors, such as electric vehicles and heating buildings.

Fossil gas utilities, however, are asking regulators to use new wind projects to create green hydrogen as a heating fuel to replace fossil (natural) gas. But the data is clear; using renewable electricity directly – for example in heat pumps or electric cars – will always be more efficient than using that same electricity to produce hydrogen and pipe that hydrogen through the leaky gas distribution system. It’s a matter of physics. If regulators allow gas utilities to use renewable energy to produce green hydrogen to heat Massachusetts buildings, utilities will hijack our offshore wind energy resources and/or other sources of clean electricity, endangering our climate goals.

Buildings generate 27 percent of Massachusetts greenhouse gas emissions, one of the largest sources of emissions in the Commonwealth. In 2020, then-Attorney General Maura Healey urged the Department of Public Utilities  to open a “Future of Gas” investigation to determine how we can rapidly decarbonize our buildings sector. The result of this utility-led process is not surprising, but also not a low-emissions or low-cost solution. Gas utilities assert the need to continue using their pipelines (replacing some and building more) to distribute a blend of green hydrogen and “renewable natural gas” as an alternative to using electric heat pumps to heat our homes and other buildings.

The gas utilities claim that using this blended gas for heating would reduce demand for electricity, compared with switching to electric heat pumps. As they have provided little or no evidence to support this, we investigated two simple questions:

• If gas utilities rely on green hydrogen, made using renewable electricity to convert water into hydrogen with electrolysis, how much renewable electricity would be needed?
• How much renewable electricity would be necessary to provide the same amount of heat to homes and other buildings using heat pumps, as proposed by the Massachusetts Clean Energy and Climate Plan for 2050?

Our finding disqualifies the use of green hydrogen for heat, without even considering the myriad issues of climate impacts, cost, equity, health, and safety that also should disqualify using green hydrogen to heat buildings.

We found that a 20 percent volume blend of green hydrogen (which would only replace 7 percent of the total gas) in the fossil gas distributed in Massachusetts would use 3.4 times as much electricity as heat pumps. While Massachusetts utilities have procured only 3.2 gigawatts of the mandated 5.6 gigawatt offshore wind by 2027, about 3.9 gigawatts would be needed to produce enough green hydrogen for this 20 percent blend. Thus, producing sufficient green hydrogen to satisfy the utilities’ plans to add it to the gas pipelines would deplete limited renewable energy and derail our efforts to decarbonize the electric grid.

Gordon Richardson has worked as an independent consultant, a consultant with Arthur D. Little, and as chief engineer at Houston-based Eastman Whipstock Inc. He is the coauthor of a report on green hydrogen production for Gas Transition Allies.  Ben Butterworth is the director of climate, energy, and equity analysis at the Acadia Center.

To read this article in Commonwealth Magazine, click here.