# US 5,707,007 A · Hydronic heating with continuous circulation supplying multi-temperature heating loops

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- Number: US 5,707,007 A
- Document ID: US5707007A
- Status: Granted
- Kind: A
- Application number: 08/731,090
- Filed: 1996-10-09
- Granted: 1998-01-13
- Earliest claimed: 1996-10-09
- Inventors: Joachim Fiedrich
- Web page: https://patentgrep.com/patent/US5707007A

## CPC

- F24D 3/02: with forced circulation, e.g. by pumps
- F24D 3/1066: {Distributors for heating liquids}
- F24D 3/12: Tube and panel arrangements for ceiling, wall, or underfloor heating (electric underfloor heating F24D13/02)
- Y02B 30/00: Energy efficient heating, ventilation or air conditioning [HVAC]
- F24D: DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR (using steam or condensate extracted or exhausted from steam engine plants for heating purposes F01K17/02)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A hydronic heating system having a source of hot supply water and a reservoir of cooler return water, a main hot supply water circulation path (loop) from the supply water line to the return water line including a pump maintaining continuous flow of hot supply water through the main loop, a satellite injection water connection and a satellite return water connection along the main loop, a satellite distribution station including a satellite heating loop, a satellite supply header and satellite return header at opposite ends of the satellite heating loop and a satellite station pump having an input and an output for pumping satellite water from the satellite return header to the satellite supply header, whereby the satellite water flows through the satellite heating loop, a satellite injection water line from the satellite injection connection to the satellite pump input and a satellite return water line from the satellite pump output to the return connection along the main loop, whereby heat from the main loop flows to the satellite loop.

## Claims

### Claim 1

A hydronic heating system having a source of hot supply water and a reservoir of cooler return water, a supply water line from said source and a return water line to said reservoir, comprising,
(a) a main hot supply water circulation path (loop) from said supply water line to said return water line including a pump maintaining continuous flow of said hot supply water through said main loop,
(b) a satellite station distribution system along said main loop including:
(c) a satellite injection water connection along said main loop and a satellite return water connection along said main loop,
(d) a satellite heating loop, a satellite supply header and satellite return header at opposite ends of said satellite loop and a satellite station pump having a pump input and a pump output for pumping satellite water from said satellite return header to said satellite supply header,
(d) whereby said satellite water flows through said satellite loop from said satellite supply header to said satellite return header,
(e) a satellite injection water line from said satellite injection connection along said main loop to said satellite pump input and
(f) a satellite return water line from said satellite pump output to said satellite return connection along said main loop,
(g) whereby heat from said main loop flows to said satellite loop.

### Claim 2 (depends on 1)

A hydronic heating system as in claim 1 wherein,
(a) means are provided for modulating said heat flow from said main loop to said satellite loop.

### Claim 3 (depends on 1)

A hydronic heating system as in claim 1 wherein,
(a) said heat flow to said satellite loop is carried by water flow through said injection water line and
(b) means are provided for modulating said injection line water flow.

### Claim 4 (depends on 3)

A hydronic heating system as in claim 3 wherein,
(a) said means for modulating said injection line water flow is a modulated valve in said satellite station.

### Claim 5 (depends on 3)

A hydronic heating system as in claim 3 wherein,
(a) said means for modulating said injection line water flow is a thermostatically modulated valve in said satellite station.

### Claim 6 (depends on 4)

A hydronic heating system as in claim 4 wherein,
(a) said modulated valve is in said return water line.

### Claim 7 (depends on 3)

A hydronic heating system as in claim 3 wherein,
(a) said modulated valve in said satellite station feeds water from said satellite station to said satellite return water line.

### Claim 8 (depends on 1)

A hydronic heating system as in claim 1 wherein,
(a) said satellite injection water connection along said main loop, said satellite return water connection along said main loop, said satellite station pump, said satellite injection water line from said satellite injection connection along said main loop to said satellite pump input and said satellite return water line from said satellite pump output to said satellite return connection along said main loop are provided as a modular unit that is interchangeable between satellite stations.

### Claim 9 (depends on 1)

A hydronic heating system as in claim 1 wherein,
(a) an isolation valve for a satellite is provided along said main loop between said satellite injection water connection along said main loop and said satellite return water connection along said main loop.

### Claim 10 (depends on 9)

A hydronic heating system as in claim 9 wherein,
(a) said isolation valve for a satellite is part of said satellite station modular unit.

### Claim 11 (depends on 7)

A hydronic heating system as in claim 7 wherein,
(a) said modulated valve in said satellite station that feeds water from said satellite station to said satellite return water line is in said return water line and
(b) is a two-way valve having means attached thereto for modulating said valve depending on the temperature of said return water in said return water line.

### Claim 12 (depends on 11)

A hydronic heating system as in claim 11 wherein,
(a) said two-way modulated valve in said satellite return water line is thermostatically controlled,
(b) said means attached thereto for modulating said valve depending on the temperature of said return water in said return water line is a thermostatic actuator and
(c) a thermostatic temperature detector in thermal connection with said return water in said return water line is connected to said thermostatic actuator,
(d) whereby thermostatic fluid in said detector and said actuator exerts a force that positions said valve depending on said return water temperature.

### Claim 13

A hydronic heating system having a boiler providing hot supply water and a reservoir of cooler return water, a boiler supply water line and a boiler return water line to said boiler reservoir, comprising,
(a) a main loop fed boiler supply water by said boiler supply line, a main water pump compelling water flow through said main loop from said boiler supply line to said boiler return water line,
(b) a satellite distribution station feeding one or more satellite station heating loops,
(c) a satellite injection water connection along said main loop and a satellite return water connection along said main loop,
(d) said satellite distribution station including a satellite heating loop supply header and satellite heating loop return header at opposite ends of said satellite loop and a satellite station pump pumping satellite water from said satellite return header to said satellite supply header,
(e) whereby heat from said main loop flows to said satellite loop.

### Claim 14 (depends on 13)

A hydronic heating system as in claim 13 in a premises having a boiler room and other rooms that are heated by said satellite station heating loops, wherein,
(a) said boiler and main loop are located in said boiler room and said satellite heating loops have parts thereof that are in said other rooms.

### Claim 15 (depends on 14)

A hydronic heating system as in claim 14 wherein,
(a) said satellite station distribution system along said main loop includes:
(c) a satellite injection water connection along said main loop and a satellite return water connection along said main loop,
(d) a satellite heating loop, a satellite supply header and satellite return header at opposite ends of said satellite loop and a satellite station pump having a pump input and a pump output for pumping satellite water from said satellite return header to said satellite supply header,
(d) whereby said satellite water flows through said satellite loop from said satellite supply header to said satellite return header,
(e) a satellite injection water line from said satellite injection connection along said main loop to said satellite pump input and
(f) a satellite return water line from said satellite pump output to said satellite return connection along said main loop,
(g) whereby heat from said main loop flows to said satellite loop.

### Claim 16 (depends on 15)

A hydronic heating system as in claim 15 wherein,
(a) means are provided for modulating said heat flow from said main loop to said satellite loop.

### Claim 17 (depends on 15)

A hydronic heating system as in claim 15 wherein,
(a) said heat flow to said satellite loop is carried by water flow through said injection water line and
(b) means are provided for modulating said injection line water flow.

### Claim 18 (depends on 17)

A hydronic heating system as in claim 17 wherein,
(a) said means for modulating said injection line water flow is a modulated valve in said satellite station.

### Claim 19 (depends on 17)

A hydronic heating system as in claim 17 wherein,
(a) said means for modulating said injection line water flow is a thermostatically modulated valve in said satellite station.

### Claim 20 (depends on 18)

A hydronic heating system as in claim 18 wherein,
(a) said modulated valve is in said return water line.

### Claim 21 (depends on 18)

A hydronic heating system as in claim 18 wherein,
(a) said modulated valve in said satellite station feeds water from said satellite station to said satellite return water line.

### Claim 22 (depends on 15)

A hydronic heating system as in claim 15 wherein,
(a) said satellite injection water connection along said main loop, said satellite return water connection along said main loop, said satellite station pump, said satellite injection water line from said satellite injection connection along said main loop to said satellite pump input and said satellite return water line from said satellite pump output to said satellite return connection along said main loop are provided as a modular unit that is interchangeable between satellite stations.