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Zawartość zarchiwizowana w dniu 2022-12-27

USE OF AIR COLLECTORS AND HEAT PUMP FOR SPACE AND WATER HEATING IN HOUSES

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This project is being set up to build 80 low energy houses in Europe - 40 in Ireland, 20 in the UK and 20 in mainland Europe. Each one of the houses will feature the TRISOL system. This is a solar assisted heat pump system with an in-line phase change store. This system provides the full space and water heating requirements of a typical family dwelling. Each house will be monitored to assess the amount of energy used, the average house temperature and the average external ambient temperature.
It is intended to prove that :
(i) A TRISOL house is indeed a low energy house saving approx. 70-75% of the energy used in a family house to an equal level of insulation, and
(ii) The system has a low maintenance requirement, is simple to use and can be flexible in providing different house temperatures at different times of the day i.e. lower in the morning and higher in the evening.
Expected energy savings 114 TOE/yr; payback 3-6 years. Depending on price for home heating in the EEC.
Patents on the system.
Design and use of collector as part of roof P50146 (IRL)
Design of collector and matrix absorber P3877
Complete heating system P3876.
The solar energy collectors are now manufactured on a commercial basis. They were tested at the SEU (University of Cardiff) with following results:
efficiency = 0.68 - 7.8 (Ti - Ta) / G at 360 m3/s
efficiency = 0.49 - 5.8 (Ti - Ta) / G at 145 m3/s.
TRISOL is the integration of solar, heat pump and heat storage technologies to produce a space and hot water heating system for the domestic house market.
The system consists of :
- a highly efficient solar air collector
- an energy processing unit (EPU) containing : the heat store, auxiliary heater and heat pump, fans dampers, water heating coil and micro processor electronic control unit
- a specially designed and manufactured insulated air duct system.
The whole package is fully integrated in the house : the solar collector is the south facing roof thereby replacing the tiles, felt and rafters; the EPU and ducts replace the conventional heating system. In this way the nett extra cost of the components when incorporated into a new house is kept low.
The house is built up to wall plate level with no particular changes being required. Solar collectors should face +/- 40 degrees south and roof pitch of 40 deg ensures collector self clean. A clear attic space is achieved by using panel and purlin construction used extensively in the Netherlands. This type of insulated roof is very strong and requires less on-site work.
THE COLLECTOR
. This is the main source of energy to the house. It is also the structural weatherproof membrane which forms the south sloping roof of the house.
. The solar roof is made up of collector 'boxes'. Each box is 1 m wide and 4 m long.
. The collector 'box' is supplied complete with insulation, special matrix absorber (98% absortivity) and tempered glass. This is all done in the factory. This box construction is very strong and is capable of spanning 2.5 m. The prerequisite number of boxes are then brought to the site and each box is then bolted to the purlins from the back. (i) The fixing crew will be out of the weather and the bolts are easier to get at;
(ii) It looks much better with no bolt heads sticking out on top of the panel; and
(iii) Bolts on top are always a possible leak point.
ENERGY PROCESSING UNIT (EPU)
. The collector delivers energy to the EPU and the electronic controller decides on how the energy should be processed.
. The store can be charged with large quantities ofenergy. However, on dull days in January for instance there may be only low grade solar energy available which is unsuitable to deliver to the house directly without processing it in the EPU with the heat pump.
The heat pump operates in a closed loop between the EPU and the collectors. DHW is supplied via a heat exchanger and DHW tank.

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Koordynator

ENERGY TECHNOLOGY IRELAND LTD
Wkład UE
Brak danych
Adres
LITTLE WATER STREET
Longford
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