Biomass Heating


Biomass thermal energy is the use of biomass for space and domestic water heating, process heat, and the thermal portion of combined heat and power.

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How to Size a Heating and Cooling System – 101

Older space conditioning systems (more than 10 years old) are often unreliable and much less efficient than a modern system. When it’s time for a new replacement, choosing one of the correct size (heating and/or cooling output) is critical to getting the best efficiency, comfort, and lowest maintenance and operating costs over the life of the new system. Some national surveys have determined that well over half of all HVAC contractors do not size heating and cooling systems correctly.

The most common sizing mistake is in oversizing. This not only makes the new system more expensive to install, but also forces it to operate inefficiently, break down more often, and cost more to operate. Oversized heating equipment also often creates uncomfortable and large temperature swings in the house. Oversized air conditioners (and heat pumps) do not run long enough to dehumidify the air, which results in the “clammy” feeling and unhealthy mold growth in many air-conditioned houses.

In this post, I’ll discuss

Incorrect Sizing Methods
Why Most Older Systems Are Oversized
Manual J and D: The Correct Way to Size a System
A Special Case: Sizing Steam Heating Systems
Steps a Good Contractor Should Take to Size a System

Read below for the full post, if you have any in-depth technical questions, feel free to leave a comment or ask them in our geothermal technical help community. 

 

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4-Step Guide to Designing Geothermal Systems

The first part to understanding any aspect of the geothermal industry, whether it be marketing, sales, design or installation is to understand how the technology works and it is designed. By understanding the design process, even if you are never going to do design yourself, you will better understand how the technology is sold, will be confident when speaking to customers, will know what information needs to be collected on a site visit, and which leads have greater potential then others. If you plan on working on the installation side, understanding design will give you the knowledge to understand the different parts of an installation and what those may cost.
If you’re new to the geothermal heat pump industry, read the Geothermal 101 Reading list. It has free tools and articles on geothermal design and installation and sales and marketing best practices. Here are some other free resources:

Free Mini-Course: Installing & Commissioning Real Time Geothermal Monitoring Systems

Article: Lessons Learned on Ground Loop Sizing from 100,000+ Hours of Real-Time Geothermal Monitoring Data

Article: Lessons Learned on Operating COPs from 100,000+ Hours of Real-Time Geothermal Data

Article: Performance-Based Contracting is the Future of Residential Geothermal
Here are the four basic steps to geothermal heat pump design. For this article, we’ll focus on a single-family residential building.
4 Steps

Heat Loss/Gain Calculations
Size Heat Pump
Size Loop Field
Size Air/Water Distribution Center

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Which is Better: Solar Thermal Flat Plate or Evacuated Tube Collectors?

Solar thermal flat plate or evacuated tube collectors? This is an incredibly common question in the solar thermal industry. Strangely enough, many people weigh in, and take different sides. Like a Red Sox vs Yankees type of rivalry, it’s a heated debate. In the end, it depends on the job you’re working on — the climate, the roof, your budget, and […]