variable refrigerant flow

The State of the Technology: Variable Refrigerant Flow Heat Pump Systems

The State of the Technology: Variable Refrigerant Flow Heat Pump Systems

Jesse Remillard and Valerie Eacret, ERS, for Zondits ERS is wrapping up a study for the Northeast Energy Efficiency Partnerships for which we performed primary and secondary cost research for a variety of key emerging technologies. One of these technologies was the variable refrigerant flow (VRF) heat pump (HP) system. Variable refrigerant flow (VRF) systems

high-temperature water systems

Boiling Point: High-Temperature Water Systems

Ryan Pollin, ERS, for Zondits Something has gone terribly horribly wrong in your campus’s steam plant, and all of the steam has condensed to a superheated liquid! The pump impellers are strained, and the steam traps are blowing every second – somebody, wake up the plant engineer! Okay, that would never happen, but some systems

CHP Offers Reliable and Affordable Biproducts

Intelligent Flow Control Supports Clean, Low Cost Energy Engineering, June 7, 2016 Major urban areas have markets for both products of a cogeneration operation: electricity and heating/cooling energy, and “district heating and cooling” is commonly used worldwide to serve commercial and residential customers. As an example, NRG Energy Center Omaha has delivered reliable and affordable

condensing unit

Is it Time to Repair or Replace Your Condensing Unit?

Condenser Units: When to Repair and When to Replace ACHR News, June 6, 2016. Image credits: stevepb CAUSE OF FAILURE Many things can cause an outdoor condensing unit to stop working, the most common of which are compressor and coil failures. Scott Merritt, owner of Fire & Ice Heating & Air Conditioning in Columbus, Ohio, also

economic growth air conditioners

The Staggering Growth of Global Air Conditioning

The world is about to install 700 million air conditioners. Here’s what that means for the climate The Washington Post, May 31, 2016 In just 15 years, urban areas of China went from just a few percentage points of air conditioning penetration to exceeding 100 percent — “i.e. more than one room air conditioner (AC)

business costs regulatory cut energy costs

DOE Invests in Projects Designed to Cut Energy Costs

DOE Invests $14 Million to Increase Energy Efficiency of US Homes and Buildings ACHR News, May 23, 2016 The U.S. Department of Energy (DOE) announced $14 million in funding for projects to significantly increase the efficiency of U.S. homes and buildings. These projects are designed to cut energy costs while leading to greater demand for

energy standards data center RagingWire Data Center containment

Data Center Containment Architecture Reduces Cooling Costs

Data center containment and control drives energy efficiency Datacenter Dynamics, May 11, 2016. Image credit: Containment and Control is an element in the strategy to improve the efficiency of data center cooling systems by isolating either the heat produced by IT equipment (hot aisle containment) or the cooling provided to the equipment (cold aisle containment).

rooftop air conditioning

Improved Savings for Rooftop Air Conditioners

More Good Efficiency News for Rooftop Air Conditioners NRDC, April 29, 2016. Image credit: derwiki The Department of Energy (DOE) recognized six large companies this week for their investments in increasing the efficiency of these rooftop air conditioners by replacing or retrofitting aging, inefficient units with more efficient machinery. Rooftop air conditioners—commonly used in low-rise buildings